Question

if 14x - 15y =28, xy =8 find value of 196x square +225 y square​

Answer 1

196x^2 + 225y^2 = (14x)^2 + (15y)^2
=(14x-15y)^2 + 2*14x*15y
=28^2 + 2*14*15*8
=784+3360
=4144