1.(2y)³-x³
来源:学生作业帮 编辑:百度作业网作业帮 分类:数学作业 时间:2024/05/13 09:40:01
1.(2y)³-x³
2.(a+b)³-(a-b)³
3.(1+2x+x²)²
4.(x+y-z)²
2.(a+b)³-(a-b)³
3.(1+2x+x²)²
4.(x+y-z)²
1和2:利用a³-b³=(a-b)³+3a²b-3ab²=(a-b)(a²-2ab+b²)+3ab(a-b)= (a-b)(a²+ab+b²)
1.(2y)³-x³ = (2y-x)³+ 3×4xy²- 3×2x²y = (2y-x)(4y²-4xy+x²)+3×2xy(2y-x) =(2y-x)(4y²+2xy+x²)
2.方法同上 答案:6a²b+2b³
3.(1+2x+x²)² = [(x+1)²]²= (x+1)^4
4.(x+y-z)²= x²+xy-xz+y²+xy-yz+z²-xz-yz= x²+y²+z²+2xy-2yz-2xz
1.(2y)³-x³ = (2y-x)³+ 3×4xy²- 3×2x²y = (2y-x)(4y²-4xy+x²)+3×2xy(2y-x) =(2y-x)(4y²+2xy+x²)
2.方法同上 答案:6a²b+2b³
3.(1+2x+x²)² = [(x+1)²]²= (x+1)^4
4.(x+y-z)²= x²+xy-xz+y²+xy-yz+z²-xz-yz= x²+y²+z²+2xy-2yz-2xz
求因式分解(x-y)²-2(x-y)³和(x+y)(x-y)-x(x-y)
(x-y)的四次方(x-y)-2(x-y)²(y-x)³等于?
1.(2y)³-x³
计算4(x+y)^5(x-y)^4÷[2(x+y)³*(y-x)²]
1/2 x²y·( )=2x³y-x²y²
因式分解 -5x³y(x-y)³+20y【x²(y-x)】²
已知方程组2x-y=10,x+2y=11,求(2x-y)³-(2x-y)²(x-3y)的值
已知x²-y²=10,求[(x+y)³-2y(x+y)²-4(x+y)]÷(x+
(x-y)³(y-x)(y-x)²+(x-y)^6
运用乘法公式(x+y+1)(x+y-1)(2x-y-3)²(2x-y-3)³【(x+2)(x-2)】
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
1.把下列各式分解因式:(1)x³y+3x-2²y²-6y;(2)x²z+x