Mathematics
Junior High
Solved

1枚目と2枚目の見分け方、違いはなんですか

(1) (x+2)(x-5) = (x+2){x+(-5)} = 公式1で、 a=2, b=-5 x²+{2+(-5)}x+2x(-5) = x²-3x-10
17 (1) (x+3)(y+4) 1 2 (x+3)(y+4) =xy+4x+3y+12 3 4'

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