(3х-1)^2+(4у+2)^2=(5х-1)(5х+1)

Question

(3х-1)^2+(4у+2)^2=(5х-1)(5х+1)

Answer 1

9x^2-6x+2+16y^2+16y+4=25x^2-1
9x^2-6x+2+16y^2+16y+4-25x^2+1=-16x^2-6x+7+16y^2+16y