Mathematics
Senior High
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因数分解する問題の(4)を教えてください
の式を因数分解せよ。
2
y+7)2
(2) (x-1)2-y²
(4)(x+y-81(y-z) 2
Answers
Answers
(x+y)=A, 9(y-z)=Bとおくと
A²-B²
=(A+B)(A-B)
={(x+y)+9(y-z)}{(x+y)-9(y-z)}
=(x+10y-9z)(x-8y+9z)
Were you able to resolve your confusion?
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