Question

-2x²+4x-7=-x²+2x-(x²-3)

Answer 1

$-2 x^{2} +4x-7+ x^{2} -2x+ x^{2} -3=0 \ 2x-10=0 \ 2x=10 \ x=5$

Answer 2

-2x²+4x-7=-x²+2x-x²+3
-2x² +x² +x² +4x -2x -7  -3=0
2х-10=0
2х=10
х=10:2
х=5