Mathematics
Senior High
Solved
高1 数Iの因数分解の問題です!
ピンクのマーカーが引いてあるところが、なぜこのような式になるのか、わかりやすく教えてください!
(3) x²+xy-2y2+2x+7y-3
= x²+(y+2)x-(2y2-7y+3)
= x²+(y+2)x-(y-3)(2y-1)
=(x-(y-3)x+(2y-1)}
=(x-y+3)(x+2y-1)
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