Question

if x+y=13 and xy=36 find the value of x2+y2

Answer 1

i hope this will help you

Answer 2

(x+y)2 =x2+y2+2xy.....put value ,,(13)2=x2+y2+2*36,,169=(x)2+(y)2+72,,97=(x)2+(y)2...hence done