Question

り

ここの式変形を教えてください！

(2) (x+1)(x²+x+1)(x²−x+1)²
G
=(x+1)(x²-x+1)x(x²+x+1)(x²-x+1)
=(x³+1){(x²+1)²-x2}
=(x³+1)(x²+x²+1)
=(x²+x³+x³)+(x+x²+1)
7
5
+ 8 = x²+x²+x²+x³+x²+1
(+9

Answer 1

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虹🌈

公式使ってる感じです♪