(3x^2-6x+5)+(4x^2+7x-6) 计算

问题描述:

(3x^2-6x+5)+(4x^2+7x-6) 计算

(3x^2-6x+5)+(4x^2+7x-6)
=3x^2-6x+5+4x^2+7x-6
=7x^2+x-1