Question

1) What are the roots of the quadratic equation x2 = 9?​

Answer 1

Answer:

Step-by-step explanation:

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.

Answer 2

Take square root both sides
We get
x=+_3
So roots are 3,-3