ab-[3ab-(4ab^2+1)]-4ab^2化简.

问题描述:

ab-[3ab-(4ab^2+1)]-4ab^2化简.

ab-[3ab-(4ab^2+1)]-4ab^2
=ab-(3ab-4ab^2-1)-4ab^2
=ab-3ab+4ab^2+1-4ab^2
=1-2ab