Mathematics
Junior High
因数分解 問4途中式どこで違うか教えてほしいです
答えC
131/4x²-2x-31+xy-3
(-3 + x)y + x² 2x-3
13
(−3+27 7+ (9-3) (x+1)
(x-3)をMとおく
(4) = My+ M (x+1)
M (y + 1 ) (x + 1)
= (x-3) (2+1) (4+1) Ⓒ
x²-2x-3y + xy - 3
(a) (x+3)(x+y+1)
(c)(x-3)(x + y + 1)
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