5x^2=125 2x^2-3x+1=0 x^2+4x+3=0 x^4+10x^2+9=0 x/x-3 = 7/x+1

Question

5x^2=125
2x^2-3x+1=0
x^2+4x+3=0
x^4+10x^2+9=0
x/x-3 = 7/x+1

Answer 1

1) 5х^2=125
х^2=125/5
х=√25=5
2) 2х^2-3х+1=0
2х^2-3х=1
Х1=1; Х2=4
3)

Answer 2

1)х=25
2)х=2 или х=1
3)х=-1 или х=-3
4)х=?
5)х=?