Question

X+Y=7 and XY =5 find 'x' square +'y' square

Answer 1

Answer:39

Step-by-step explanation:(x+y)^2=x^2+y^2+2(xy)

Substitute x+y=7, xy=5 (given)

(7)^2=x^2+y^2+2(5)

49=x^2+y^2+10

49-10=x^2+y^2

39=x^2+y^2