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

题目详情
化简y=2000m(1+2x%)(8-x)%
y=2000m(1+2x%)(8-x)% 化简一下就好了
▼优质解答
答案和解析
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