Mathematics
Senior High
Solved
このふたつの問題の解き方が違うのは何故でしょうか?なぜ4番は(a+1)にbをかけるのでしょうか?
(3) 4-4y+2xy-x²
2(x-2)= x²+4
=2(x-2)g-(x+2)(x-2)
=(x-2)(x-2y+2)
(4) a2b+a-b-1
COAUFF!
=(a²=-176 (a-1)
=(α-1xa+b+la+
(a-1){(a+16+1}
=
= (a->(ab+b+17
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