- 7.因式分解5x(x
- 5x(x-y)+2y(x-y)
2a(a-b)-4b(b-a)
-8a(a-2b)^3+2a^3(2b-a)2
10a(y-x)+5b(y-x)
4x^2+4xy+y^2
9x^2+6xy+y^2
25x^4-10^2+1
9a^4-81b2
36X^2-84xy+49y^2
x^2+8xy+16y^2
- 5x(x-y)+2y(x-y)=(x-y)(5x+2y)
2a(a-b)-4b(b-a)=2(a-b)(a+2b)
-8a(a-2b)^3+2a^3(2b-a)2=-2a(a-2b)^2(4a-8b+a^2)
10a(y-x)+5b(y-x)=5(y-x)(2a+b)
4x^2+4xy+y^2=(2x+y)^2
9x^2+6xy+y^2=(3x+y)^2
25x^4-10^2+1=(5x-1)^2
9a^4-81b2=9(a^2+3b)(a^2-3b)
36X^2-84xy+49y^2=(6x-7y)^2
x^2+8xy+16y^2 =(x+4y)^2