x2+2x-4(因式分解)

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x2+2x-4(因式分解)
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x2+2x-4(因式分解)
x2+2x-4(因式分解)

x2+2x-4(因式分解)
x^2+2x-4
=(x^2+2x+1)-5
=(x+1)^2-5=0
=(x+1+√5)(x+1-√5)

x²+2x-4
=x²+2x+1-5
=(x+1)²-5
=(x+1+√5)(x+1-√5)

x2+2x-4=x2+2x+1-5=(x+1)^2-5=(x+1+5^0.5)(x+1-5^0.5)