分解因式(1)x³y²-4x²y+4x;(2)25m²-20m(m-3n)+4(
来源:学生作业帮 编辑:拍题作业网作业帮 分类:数学作业 时间:2024/04/25 20:06:30
分解因式(1)x³y²-4x²y+4x;(2)25m²-20m(m-3n)+4(m-3n)²;下转(3)
(3)4y²-2y+¼;(4)-x²-4y²+4xy;(5)(x+y)²-6(x+y)+9;(6)4-12(x-y)+9(x-y)²;(7)-9a²+12ab-4b²;(8)a²x²y+4x²y²;(9)-x³+x²-0.25x;(10)a²+b²+2ab+2a+2b+1;
(3)4y²-2y+¼;(4)-x²-4y²+4xy;(5)(x+y)²-6(x+y)+9;(6)4-12(x-y)+9(x-y)²;(7)-9a²+12ab-4b²;(8)a²x²y+4x²y²;(9)-x³+x²-0.25x;(10)a²+b²+2ab+2a+2b+1;
(1)x³y²-4x²y+4x;
=x(x²y²-4xy+4)
=x(xy-2)²
(2)25m²-20m(m-3n)+4(m-3n)²;
=(5m-2(m-3n)²
=(5m-2m+6n)²
=(3m+6n)²
=9(m+2n)²
(3)4y²-2y+¼;
=(2y-1/2)²
(4)-x²-4y²+4xy;
=-(x²-4xy+4y²)
=-(x-2y)²
(5)(x+y)²-6(x+y)+9;
=(x+y-3)²
(6)4-12(x-y)+9(x-y)²;
=(2-3(x-y))²
=(2-3x+3y)²
(7)-9a²+12ab-4b²;
=-(9a²-12ab+4b²)
=-(3a-2b)²
(8)a²x²y+4x²y²;
=x²y(a²+4y)
(9)-x³+x²-0.25x;
=-x(x²-x+0.25)
=-x(x-0.5)²
(10)a²+b²+2ab+2a+2b+1;
=(a+b)²+2(a+b)+1
=(a+b+1)²
=x(x²y²-4xy+4)
=x(xy-2)²
(2)25m²-20m(m-3n)+4(m-3n)²;
=(5m-2(m-3n)²
=(5m-2m+6n)²
=(3m+6n)²
=9(m+2n)²
(3)4y²-2y+¼;
=(2y-1/2)²
(4)-x²-4y²+4xy;
=-(x²-4xy+4y²)
=-(x-2y)²
(5)(x+y)²-6(x+y)+9;
=(x+y-3)²
(6)4-12(x-y)+9(x-y)²;
=(2-3(x-y))²
=(2-3x+3y)²
(7)-9a²+12ab-4b²;
=-(9a²-12ab+4b²)
=-(3a-2b)²
(8)a²x²y+4x²y²;
=x²y(a²+4y)
(9)-x³+x²-0.25x;
=-x(x²-x+0.25)
=-x(x-0.5)²
(10)a²+b²+2ab+2a+2b+1;
=(a+b)²+2(a+b)+1
=(a+b+1)²
1.9m²-n²+3m-n 2.x²-4xy-1+4y² (分解因式)
运用公式法分解因式(1) -x^5y^3+x^3y^5(2) 9(m+n)^2-25(m-n)^2(3) x^2-4y^
分解因式 (x+2y)²-x²-2xy -7m(m-n)³+21mn(n-m)²
1..x(m-n)^3-x^2(n-m)^2~2..4m(x-y)-2m^2(y-x)^3 分解因式 具体
-m²n(x-y)的n次方+mn²(x-y)的n+1次方 分解因式
分解因式:(x-1)+b²(1-x),m²/9减n四次方/256,-4(x+2y)²+9(
把下列各式分解因式:(1).(x-y)²+6(x-y)+9 (2)(m-n)²-9(m+n)
分解因式:9-x²;已知4m+n=90,2m-3n=10,求(m+2n)²-(3m-n)²
分解因式:a^3-a,b^2(x-3)+b^2(3-x),16(m-n)^2-9(m+n)^2,4x^2(x-y)+(y
计算(1)(3m-4n)(3m+4n)-(2m-2n)(2m+n) (2)(x+5y)²-(x-5y)
分解因式1.-4m^2-9n^2+12mn2.4(x+y)^2+25-20(x+y)3.x^n+2-8x^n+1 +16
分解因式:1、(x-1)(x+4)+4;2、(m²+n²)²-4m²n²