(2x²-1/2+3x)-4(x-x²+1/2) 化简

问题描述:

(2x²-1/2+3x)-4(x-x²+1/2) 化简

(2x²-1/2+3x)-4(x-x²+1/2)
=2x^2-1/2+3x-4x+4x^2-2
=6x^2-x-5/2