8x^3y^3-1/125 4a^2+b^2+c^2-4ab+4ac-2bc 5X^2-15x+2xy-6y a^2(x+y)^3-a^2b^3还有几个 7(a+b)^2-5(a+b)-26x^2-7x-3x^3+2x^2+2x+12X^2-3x-1x^2+4x-1

8x^3y^3-1/125 4a^2+b^2+c^2-4ab+4ac-2bc 5X^2-15x+2xy-6y a^2(x+y)^3-a^2b^3还有几个 7(a+b)^2-5(a+b)-26x^2-7x-3x^3+2x^2+2x+12X^2-3x-1x^2+4x-1
8x^3y^3-1/125 4a^2+b^2+c^2-4ab+4ac-2bc 5X^2-15x+2xy-6y a^2(x+y)^3-a^2b^3
还有几个
7(a+b)^2-5(a+b)-2
6x^2-7x-3
x^3+2x^2+2x+1
2X^2-3x-1
x^2+4x-1

8x^3y^3-1/125 4a^2+b^2+c^2-4ab+4ac-2bc 5X^2-15x+2xy-6y a^2(x+y)^3-a^2b^3还有几个 7(a+b)^2-5(a+b)-26x^2-7x-3x^3+2x^2+2x+12X^2-3x-1x^2+4x-1
8x^3y^3-1/125
=(2xy)^3-(1/5)^3
=(2xy-1/5)(4x^2y^2+2xy/5+1/25)
4a^2+b^2+c^2-4ab+4ac-2bc
=(2a-b)^2+2c(2a-b)+c^2
=(2a-b+c)^2
( 5X^2-15x+2xy-6y
=x(5x+2y)-3(5x+2y)
=(5x+2y)(x-3)
a^2(x+y)^3-a^2b^3
=a^2[(x+y)^3-b^3]
=a^2(x+y-b)[(x+y)^2+b(x+y)+b^2]
=a^2(x+y-b)(x^2+2xy+y^2+bx+by+b^2)
希望能帮到你,祝学习进步O(∩_∩)O

8x^3y^3-1/125
=(2xy-1/5)(4x^2y^2+2/5xy+1/25)
4a^2+b^2+c^2-4ab+4ac-2bc
=4a^2-4a(b+c)+(b+c)^2
=(2a-b-c)^2
5X^2-15x+2xy-6y
=5x(x-3)+2y(x-3)
=(5x+2y)(x-3)
a^2(x+y)^3-a^2b^3
=a^2((x+y)^3-b^3)
=a^2(x+y-b)((x+y)^2+(x+y)b+b^2)

字母或括号后面的数是指数，不要弄错了哦 帮帮忙 感激不尽！1 要表示指数的话可以用^表示啊！比如表示x的5次方可以用x^5表示！

7(a+b)^2-5(a+b)-2
=[（a+b)-1]*[7(a+b)+2]
6x^2-7x-3
=(3x+1)(2x-3)
x^3+2x^2+2x+1
=(x^3+1)+(2x^2+2x)
=(x+1)(x^2-x-1)+2x(x+1)
=(x+1)(x^2+x-1)
2X^2-3x-1
=???
x^2+4x-1
=？？？？