(10-x·x)×4+(10-x·10-x)=?
问题描述:
(10-x·x)×4+(10-x·10-x)=?
答
原式=40-4x²+10-10x-x
=-4x²-11x+50
(10-x·x)×4+(10-x·10-x)=?
原式=40-4x²+10-10x-x
=-4x²-11x+50