Solve y = x^2 + 2 for x:
1) Isolate x^2: x^2 = y - 2
2) Find the square root of this result: x = plus or minus √(y-2) (answer)
[tex]y = x^2 + 2[/tex]
To solve for x we need to get x alone
[tex]y = x^2 + 2[/tex]
To get x alone, we need to remove +2
subtract 2 on both sides
[tex]y-2= x^2 + 2-2[/tex]
[tex]y-2 = x^2[/tex]
Take square root on both sides
[tex]+-\sqrt{y-2} = x[/tex]
We got x alone
[tex]x = +-\sqrt{y-2}[/tex]
