1.(m+1)2-9(m-1)2注数字或字母的上方的2是平方,3是3的平方2.(x-1)(x-3)+13.4X3+4x2y2+xy34.(a+2b)2-a2-2ab5.-2(m-n)2+326.x(x-5)2+x(x-5)(x+5)

Question

1.(m+1)2-9(m-1)2 注数字或字母的上方的2是平方,3是3的平方
2.(x-1)(x-3)+1
3.4X3+4x2y2+xy3
4.(a+2b)2-a2-2ab
5.-2(m-n)2+32
6.x(x-5)2+x(x-5)(x+5)

Answer 1

简单的啊
1.
（m+1）^2-[3(m-1)]^2
(m+1-3m+3)(m+1+3m-3)
(-2m+4)(4m-2)
-4(m-2)(2m-1)
2.
(x-1)(x-3)+1
x^2-4x+3+1
(x-2)^2
3.
4X^3+4x^2y^2+xy^3
x(4x^2+4xy^2+y^3)
x(4x^2+2xy^2+2xy^2+y^3)
x[2x(2x+y)+y^2(2x+y)]
x[(2x+y^2)(2x+y)]
4.
(a+2b)2-a2-2ab
a^2+4ab+4b^2-a^2-2ab
2ab+4b^2
2b(a+2b)
5.
-2(m-n)2+32
-2[(m-n+4)(m-4-4)]
6.
x(x-5)2+x(x-5)(x+5)
x(x-5)[(x-5)+(x+5)]
2x^2(x-5)