Mathematics
Senior High
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赤線のところがどうしたらそうなるのか教えてください!
(2) (x+1)(x2+x+1)(x²-x+1)²=(x+1)(x²-x+1)x(x²+x+1)(x²-x+1)
(x³+1){(x²+1)²= x²}=(x³+1)(x1+x²+1)
=(x+x+x³)+(x+x²+1)
=x'+x+x4+x + x2 + 1
(3) (a-b)³ (a+b)³ (a2+b²)3 = {(a - b)(a+b)(a+b)}3
=((a2-62)(a+b)=(a*-64)3
=a12-3a8b+3ab8-612
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ありがとうございます!!