y=2x^2-3x+4配方后等于多少?

问题描述:

y=2x^2-3x+4配方后等于多少?

y=2x^2-3x+4=2(x²-3/2)+4
=2(x-3/4)²-9/8+4
=2(x-3/4)²+23/8