Question

what are a roots of the quadratic equation x2=9​

Answer 1

Answer:

x^2 = 9

x^2 - 9 =0

(x +3) (x -3) =0

x = 3,-3

roots of the quadratic equation x2=9 is 3 ,-3

Answer 2

Answer:

x = −3 or 3.

Step-by-step explanation:

Solving Quadratics Using Square Roots

One way to solve the quadratic equation x2 = 9 is to subtract 9 from both sides to get one side equal to 0: x2 – 9 = 0. The expression on the left can be factored: (x + 3)(x – 3) = 0. Using the zero factor property, you know this means x + 3 = 0 or x – 3 = 0, so x = −3 or 3.