因式分解:x^2+2x+1-y^2
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因式分解:x^2+2x+1-y^2
因式分解:x^2+2x+1-y^2
因式分解:x^2+2x+1-y^2
x^2+2x+1-y^2=(x+1)^2-y^2=(x+y+1)(x-y+1)
x^2+2x+1-y^2
=(x+1)²-y²
=()x+1+y(x+1-y)