Question

（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

Answer 1

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.(y^2-1)(x^4-1)=(y+1)(y-1)(x^2+1)(x^2-1)=(y+1)(y-1)(x^2+1)(x+1)(x-1)