a^2+a+1/4 分解因式a^2+a+1/4 -2xy-x^2-y^2

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a^2+a+1/4 分解因式a^2+a+1/4 -2xy-x^2-y^2

a^2+a+1/4 分解因式a^2+a+1/4 -2xy-x^2-y^2
a^2+a+1/4 分解因式
a^2+a+1/4
-2xy-x^2-y^2

a^2+a+1/4 分解因式a^2+a+1/4 -2xy-x^2-y^2
a^2+a+1/4
a^2+2*(1/2)*a+(1/2)^2
=(a+1.2)^2
-2xy-x^2-y^2
=-(x^2+2xy+y^2)
=-(x+y)^2

a²+a+1/4=(a+1/2)²
-2xy-x²-y²=-(x²+2xy+y²)=-(x+y)²

(a+0.5)^2
-(x+y)^2

(a+1/2-x-y)(a+1/2+x+y)