计算:4(m-1)^2+(2m+5)(5-2m)
问题描述:
计算:4(m-1)^2+(2m+5)(5-2m)
答
4(m-1)^2+(2m+5)(5-2m)
=4m^2-8m+4+25-4m^2
=-8m+29
答
4(m-1)^2+(2m+5)(5-2m)
=4(m-1)^2-(2m+5)(2m-5)
=4m^2-8m+4-(4m^2-25)
=-8m+29