(1)64m^2·n-(m^2+16n^2) (2)m^3·n-9mn (3)(a+1)(a-1)-a(a-1)分解因式,
问题描述:
(1)64m^2·n-(m^2+16n^2) (2)m^3·n-9mn (3)(a+1)(a-1)-a(a-1)分解因式,
(4)-1/2·a^2+2b^2
(5)a^3b-ab^3
(6)(a-1)+b^2(1-a)
(7)x^5-x
(8)x^6-x^2·y^4
(9)x^4(y^2-1)+(1-y^2)
答
4. 2(b^2-1/4*a^2)=2(b+1/2·a)(b-1/2·a)5.ab(a^2-b^2)=ab(a+b)(a-b)6.(a-1)(1-b^2)=(a-1)(1+b)(1-b)7.x(x^4-1)=x(x^2+1)(x^2-1)=x(x^2+1)(x+1)(x-1)8.x^2(x^4-y^4)=x^2(x^2+y^2)(x^2-y^2)=x^2(x^2+y^2)(x+y)(x-y)9...1. 2. 3呢?不好意思没看见1,2,31.第一个题目对吗?m^2(64n-1)-16n^22.mn(m^2-9)=mn(m+3)(m-3)3.(a+1)(a+1-1)=a(a+1)