x²-10x+25=5x²-(4x²-1)
x²-10x+25=5x² - 4x²+1
x²-10x+25=x²+1
x²-x²-10x+25-1=0
-10x=-24
x=2,4
х²-10х+25=5х²-2х²+1
х²-10х-5х²+2х²=1-25
-2х²-10х=-24
-2х²-10х+24 / *-1
2х²+10-24
x²-10x+25=5x²-(4x²-1)
x²-10x+25=5x² - 4x²+1
x²-10x+25=x²+1
x²-x²-10x+25-1=0
-10x=-24
x=2,4
х²-10х+25=5х²-2х²+1
х²-10х-5х²+2х²=1-25
-2х²-10х=-24
-2х²-10х+24 / *-1
2х²+10-24