求解x的平方加2x减一因式分解(x²+2x-1)
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求解x的平方加2x减一因式分解(x²+2x-1)
求解x的平方加2x减一因式分解(x²+2x-1)
求解x的平方加2x减一因式分解(x²+2x-1)
x²+2x-1
=x²+2x+1-2
=(x+1)²-2
=(x+1+√2)(x+1-√2)
(x²+2x-1)
=x²+2x+1-2
=(x+1)²-2
=(x+1+√2)(x+1-√2)
x²+2x-1
=x²+2x+1-2
=(x+1)²-2
=(x+1+√2)(x+1-√2)