【1】4x^2-(x^2+1)^2【2】m^2(p-q)-P+q【3】(m^2+1)^2-20(m^2+1)+100【4】(a-b)^2(3a-2)+(2-3b)b^2

问题描述:

【1】4x^2-(x^2+1)^2
【2】m^2(p-q)-P+q
【3】(m^2+1)^2-20(m^2+1)+100
【4】(a-b)^2(3a-2)+(2-3b)b^2

【1】4x^2-(x^2+1)^2
= (2x+x^2+1)(2x-x^2-1)
=-(x+1)²(x-1)²
【2】m^2(p-q)-P+q
=(m^2-1)(p-q)
=(m+1)(m-1)(p-q)
【3】(m^2+1)^2-20(m^2+1)+100
=(m^2+1-10)²
【4】(a-b)^2(3a-2)+(2-3b)b^2
=(3a-b)(a-b+b)(a-b-b)
=(3a-b)a(a-2b)