Question

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

Answer 1

Step-by-step explanation:

(5x+2x)^2

(5x)^+ (2y)^2 +20xy - 20xy +20xy

= (5x -2x)^2 + 40xy

= (7)^2 + 40×2

=49+80

=129