化简a^2+b^2-1/2a^2-1/2(a+b)*b

问题描述:

化简a^2+b^2-1/2a^2-1/2(a+b)*b

原式=a²+b²-1/2a²-1/2ab-1/2b²
=1/2a²-1/2ab+1/2b²