Use the equation y=x4−2x2b2+b4 to answer the question.

Question

How can you rewrite the given formula to correctly isolate x?

Answer 1

y = x^4 - 2x^2 b^2 + b^4
y = (x^2 - b^2)^2
x^2 - b^2 = ±√y
x^2 = b^2±√y
x = ±√(b^2±√y)