Question

( x - 2y + 3)2 +( x + 2y - 3)2

Answer 1

$= 2x - 4y + 6 + 2 x+ 4y - 6 \\ = 4x \\ x = - 4$
I hope it is the answer

Answer 2

( x - 2y + 3)2 +( x + 2y - 3)2
= 2x - 4y + 6 + 2x + 4y - 6
= 4x

Or

x = -4