Question

11. If y +y = 7 and xy =2 then value of x2 + y2 is​

Answer 1

Answer:

x+y = 7

square in both sides

(x+y)^2 = 49 (x2+y2+2xy identity

x2+ y2 + 2× 2= 49(putting value of xy= 2)

x2+ y2 = 49-4

x2+y2= 45

hope it helps