Mathematics
Senior High
Resolved
なぜ蛍光ペンの式になるんですか?
+6
= (3x + 2)(9.-6.x+4)
3 (α+
ニ
(2) 2-128 =D 2(x°ー64p)
まず
- 2{ー(4y)")
= 2(x-4y)(x° +4.xy+16y°)
= (h
(3) ー6x+12x-8=x°-3·x°·2+3·x·2°-29
(x-2)
(4) 82°+36xy+54xy° + 27y
(2x)+3·(2x)?· (3y) +3·(2x) · (3y)? + (3y)
(2x+3p)
(5) +yー3xy+1
= (x+y)°-3xy(x+y)-3xy+1°
= (x+y)+1°-3xy(x+ y+1)
= {(x+y)+1}{(x+y)* (x+y)·1+1°}-3xy(x+y+1)
= (x+y+1){(x+y)?- (x+y)+1-3xy}
ニ
ニ
(別解)
x°+y°-3xy+1
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