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Mathematics Senior High

練習問題19と20と21の答えを教えてください🙄🥺 途中式を入れてくれるとありがたいです💗

Link 補充! 15 26 第1章 数と式 20 ページの展開の公式 4 を逆にみると,次の公式が得られる。 例題 8 4_x²+(a+b)x+ab=(x+a)(x+b) x2+3x-10を因数分解せよ。 考え方 和が 3, 積が -10 となる2つの数を見つければよい。まず,積が 10 となる2つの数を先に考え、次の表のように和が3になるか 調べてみる。 例題 積が10 和が3か? 1と10 -9 x 解答 x2+3x-10=(x-2)(x+5) 練習 次の式を因数分解せよ。 19 (1) x2 +3x+2 (4) x2+4x-12 -1と10 25 -3 X 9 x 練習 次の式を因数分解せよ。 20 (1)x2-9xy+18y2 (2) x²+7x+10 (5) x²-8x+15 x2-xy-6y2を因数分解せよ。 考え方x2+(-y)x-6y2 から 和が-y, 積が -6y2 解答 x2-xy-6y=x2+(2y-3y)x+2y・(-3y) =(x+2y)(x-3y) 2と5 (2) x²+ax-20a² 30 (3) x2-x-12 (6) x2-9x+8 Link イメージ 5 10 15 第1節 数と式 21ページの展開の公式5を逆にみると、 次の公式が得られる。 例題 10 5acx²+(ad+bc)x+bd=(ax+b)(cx+d) 2x²-11x+5を因数分解せよ。 考え方 公式5において ac=2, ad+bc=-11, bd=545 となる a, b, c, dを見つければよい。 ① ac=2の2を 1×2 合 bd=5の5を 1×5,5×1, 2 1 5 11 x 失敗) ad+bc=-11 とならない。 (-1)×(-5), (-5)×(-1) b axa と,積に分解する。 ② α=1,c=2として, 6, dの候補から ad+bc = -11 となる ものをさがす このとき, 右上の図式を利用するとよい。 b=5, d=1のとき b=-5, d=-1のとき 1 5-10 |2x2-11x+5=(x-5)(2x-1) 練習 次の式を因数分解せよ。 Link 補充 21 20 (1) 3x²+4x+1 (4) 2.x2+3x-2 (7) 3x²-10xy+3y2 ac 1. 2 2 27 bc ad bd ad+bc このような計算を 「たすき掛け」 といいます -5 -10 -1→ -1 5 (2) 2x²+7x+3 (5) 3.x²+x-2 (8) 4x² +3xy-27y2 11 ○ 成功 ad+bc=-11となり,適する。 第1章 数と式 (3) 2x²–5x+3 (6) 3x²-7x-6 (9) 6x²+ax-15a²

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Biology Senior High

これの解説をして欲しいです

12497 SICE Date 一粒系コムギ(AA) と野生型コムギ(BB) が交雑してできた雑種1 (AB) から二粒系コムギ (AABB) が生じた。 さらに二粒系コムギとタルホコムギ(DD) の間の雑種2 (ABD) をもとに パンコムギ(AABBDD) が出現した。 雑種1から二粒系コムギが, 雑種2からパンコムギが 出現する際に, 倍数化が起こったと考えられている。 雑種1と雑種とでは正常な減数分裂は 行われないが,それらに起源する二粒系コムギとパンコムギでは,いずれも倍数化によって 正常な配偶子形成が行われるようになった。 雑種1と雑種2では正常な減数分裂が行われないのはなぜか。 その理由を40字以内で説 明しなさい。 一粒系コムギ(ヒトツブコムギ) AA 雑種 1 AB 野生型コムギ (植物名は不明) BB 倍数化 粒系コムギ(マカロニコムギ) AABB 雑種2 ABD srch/ex/data/2019/10/s01/s10191501k0.html タルホコムギ DD 倍数化 パンコムギ (普通系コムギ) AABBDD 間 8. 相同染色体の対合が起こらないため、 染色体が正常に娘細胞に分配されないから。 125 (37字) 間 8. 減数分裂第一分裂では, 相同染色体が対合し、 別々の娘細胞へと分離する。 雑種1の細胞には AとBの染色体が1本ずつしかないため,これらの染色体は対合・分離が正常に行われない。 雑1の倍数化によって生じた二粒系コムギは, AとBの染色体が2本ずつあるため、 それぞ れ相同染色体として対合し、正常に娘細胞へと分配される。

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English Senior High

和訳お願いします。

次の英文を読んで, 設問に答えなさい。 [5] The headline grabs your attention: "The ancient tool used in Japan to boost memory." You've been The Japanese art of racking up clicks online more forgetful recently, and maybe this mysterious instrument from the other side of the world, no less! could help out? You click the link, and hit play on the video, awaiting this information that's bound to change your life. The answer? A soroban (abacus). Hmm, () それは私がどこに鍵を置いたか覚えておく助けになりそうには ないですよね? This BBC creation is part of a series called "Japan 2020," a set of Japan-centric content looking at various inoffensive topics, from the history of Hiroshima-style okonomiyaki pancakes to pearl divers. The abacus entry, along with a video titled "Japan's ancient philosophy that helps us accept our flaws," about kintsugi (a technique that involves repairing ceramics with gold-or silver-dusted lacquer), cross over into a popular style of exploring the country: Welcome to the Japan that can fix you. For the bulk of the internet's existence, Western online focus toward the nation has been of the "weird Japan" variety, which zeroes in rare happenings and micro "trends," but presents them as part of everyday life, usually just to entertain. This sometimes veers into "get a load of this country" posturing to get more views online. It's not exclusive to the web traditional media indulges, too but it proliferates online. Bagel heads, used underwear vending machines, rent-a-family services - it's a tired form of reporting that has been heavily criticized in recent times, though that doesn't stop articles and YouTube videos from diving into "weird Japan." These days, wacky topics have given way to celebrations of the seemingly boring. This started with the global popularity of Marie Kondo's KonMari Method of organizing in the early 2010s, which inspired books and TV shows. It's online where content attempts to fill a never-ending pit - where breakdowns of, advice and opinions about Kondo emerged the most. Then came other Japanese ways to change your life. CNBC contributor Sarah Harvey tried kakeibo, described in the headline as "the Japanese art of saving money." This "art" is actually just writing things down in a notebook. Ikigai is a popular go-to, with articles and videos popping up all the time explaining the mysterious concept of ... having a purpose in life. This isn't a totally new development in history, as Japanese concepts such as wa and wabi sabi have long earned attention from places like the United States, sometimes from a place of pure curiosity and sometimes as pre-internet "life hacks" aimed making one's existence a little better. (B) The web just made these inescapable. There's certainly an element of exoticization in Western writers treating hum-drum activities secrets from Asia. There are also plenty of Japanese people helping to spread these ideas, albeit mostly in the form of books like Ken Mogi's "The Little Book of Ikigai." It can result in dissonance. Naoko Takei Moore promotes the use of donabe, a type of cooking pot, and was interviewed by The New York Times for a small feature this past March about the tool. Non- Japanese Twitter users, in a sign of growing negative reactions to the "X, the Japanese art of Y" presentations, attacked the piece... or at least the headline, as it seemed few dove the actual content of the article (shocking!), which is a quick and pleasant profile of Takei Moore, a woman celebrating her country's culinary culture. Still, despite the criticism by online readers, the piece says way more about what English-language readers want in their own lives than anything about modern Japan. That's common in all of this content, and points to a greater desire for change, whether via a new cooking tool or a "Japanese technique to overcome laziness." The Japan part is just flashy branding, going to a country that 84% of Americans view positively find attention-grabbing ideas for a never-ending stream of online content. And what do readers want? Self-help. Wherever they can get it. Telling them to slow down and look inside isn't nearly as catchy as offering them magical solutions from ancient Japan.

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