(x+y)²-4(x+y-1)
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(x+y)²-4(x+y-1)
(x+y)²-4(x+y-1)
(x+y)²-4(x+y-1)
(x+y)²-4(x+y-1)
=(x+y)²-4(x+y)+4
=(x+y-2)²
x²+y²+2xy-4x-4y+4
(x+y-2)的平方
(x+y)²-4(x+y-1)
=(x+y)²-4(x+y)+4
=(x+y-2)²
(x+y)²-4(x+y-1)
=(x+y)²-4(x+y)+4
=(x+y)²-2*2(x+y)+2² 完全平方公式
=(x+y-2)²
(x+y)²-4(x+y-1)
计算x²-x/x²×x/1-x和x²-4y²/x²+2xy+y²÷x+2y/x²+xy
因式分解 (x²+y²-1)²-4x²y²
(X-3)²+(Y+4)²=1 求X²+Y²的最大值
(X-3)²+(Y+4)²=1 求X²+Y²的最大值
因式分解2x(x-y)^4 - x²(x-y)² + xy(y-x)²RT
9(x-y)²+12(x²-y²)+4(x+y)² 因式分解
已知(x+y)²;=8,(x-y)²;=4,求x²+y²
x²y²-x²y-xy²+x+y-1因式分解
在线求助完全平方公式因式分解(1)-a²-1+2a(2)2x²y-x²-xy²(3)4x²-20x+25(4)(x²+1)²-4x²(5)(2x-y)²-2(2x-y)+1(6)(x+y)²-2(x²-y²)+(x-y)²
(x-2y)²+2x-4y+1 因式分解
(x+y)²-4(x+y-1)
(x+y)²-10(x+y)+25 4m²-9n²-4m+1
1、x²+4y²+_______=(x-2y)²
(1/3xy)²*(-12x²y²)÷(-4/3x³y)
-3x²(1/3xy-y²)+4x(x²y-xy²)+x³y,其中x=1,y=
分解因式:2x²-8xy+5y²6x²-9x-4242x²-85xy+42y²3x²-5xy-y²(2x-y+3)(2x-y+1)-15(x+y)²+4(x+y)(3x-y)+4(3x-y)²完全按照原题打的
x²-4y² x+2y---------- ÷ --------分数线x²+2xy+y² x²+xyx²-4y² x+2y----------÷--------分数线x²+2xy+y² x²+xy(x+2y)(x-2y)x(x+y)=----------------(x+y)(x+y)(x+2y)(x-y)x=------(x+y)这样对了吗?