Find the minimum value of A=x^2 + y^2 if x + y =10_英语解答

Find the minimum value of A=x^2 + y^2 if x + y =10

人气：383 ℃　时间：2020-05-22 17:14:19

解答

A=x^2 + y^2
= x^2+(10-x)^2
=2x^2-20x+100
when x=5 A is minimun,that is 50