发布时间:2019-08-27 13:18:50
分解因式a·b的四次方-4ab³+4ab²
因式分解(x+y)²-4(x+y-1)
4x²+4xy+y²-1
(x²+y²)²-4x²y²
ab^4-4ab^3+4ab^2=ab^2(b^2-4b+4)=ab^2(b-2)^2
(x+y)^2-4(x+y-1)=(x+y)^2-4(x+y)+4=(x+y-2)^2
4x^2+4xy+y^2-1=(2x+y)^2-1=(2x+y+1)(2x+y-1)
(x^2+y^2)^2-4x^2y^2=(x^2+y^2+2xy)(x^2+y^2-2xy)=(x+y)^2(x-y)^2
ab⁴-4ab³+4ab²
=ab²(b²-4b+4)
=ab²(b-2)²
(x+y)²-4(x+y-1)
=(x+y)²-4(x+y)+4
=(x+y-2)²
4x²+4xy+y²-1
=(2x+y)²-1
=(2x+y-1)(2x+y+1)
(x²+y²)²-4x²y²
=x⁴+2x²y²+y⁴-4x²y²
=(x²-y²)²
①解:原式=ab²(b²-4b+4)
=ab²(a-2)²
②解:原式=(x+y)²-4(x+y)+4
=(x+y-2)²
③解:原式=(2x+y)²-1²
=(2x+y+1)(2x+y-1)
④解:原式=(x²+y²+2xy)(x²+y²-2xy)
=(x+y)²(x-y)²