What is x^2 + v = w when you have to make x the subject

im really stuck

X²+v=w (move v to w)
x²=w-v
x=√w-v (then square root w-v)

Substract v to both sides of the equation: x^2+v-v = w-v
you get x^2=w-v
Now take the square root of both sides: root(x^2) = root(w-v)
you get x= sq root (w-v)   or        x= +/-  sq root(w-v)

X= 49; x = 4step 1: foilstep 2: equal both to 0step 3: find x individually