Question

Which equation is equivalent to the equation x^2+y^2= 25?

Answer 1

9514 1404 393

Answer:

D. y = ±√(25 -x²)

Explanation:

Subtract x² and take the square root to solve for y.

x² +y² = 25 . . . . . . . given

y² = 25 -x² . . . . . . . . subtract x²

y = ±√(25 -x²) . . . . . take the square root