(3х-5)^2=(2х+4)^2+(х+3)^2

Question

(3х-5)^2=(2х+4)^2+(х+3)^2

Answer 1

9x^2-30x+25=4x^2+16x+16+x^2+6x+9
9x^2-5x^2-30x-22x+25-25=0
4x^2-55x=0
x(4x-55)=0
x=0 или 4x-55=0
               4x=55
               x=13.75