Question

Write x2 in isolated
form.
X^2 + (y + 1)^2 = 20

Answer 1

`x^(2)=-y^2-2y+19`

Explanation:

we have

`x^(2) +(y+1)^2=20`

Isolate the variable x^2

Subtract (y+1)^2 both sides

`x^(2)=20-(y+1)^2`

`x^(2)=20-(y^2+2y+1)`

`x^(2)=20-y^2-2y-1`

`x^(2)=-y^2-2y+19`