Question

if 5x-2y=7 and xy=2 find the value of (5x+2y)sq.

Answer 1

Concepts Used :-

1) Identity
${(x + y)}^{2} = {x}^{2} + {y}^{2} + 2xy$
2) Identity
${(x - y)}^{2} = {x}^{2} + {y}^{2} - 2xy$
3) Putting the values in an equation and solving for finding the required unknown value.