化简y=2000m(1+2x%)(8-x)%

问题描述:

化简y=2000m(1+2x%)(8-x)%
y=2000m(1+2x%)(8-x)% 化简一下就好了

y=2000m(1+2x%)(8-x)%
=20m(1+0.02x)(8-x)
=20m(8-x+0.16x-0.02x^2)
=20m(-0.02x^2-0.84x+8)
=-0.4mx^2-16.8mx+160m