Question

wath are the root of quadratic equation x2=9?​

Answer 1

Answer:

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

Answer:

x²-9 =0

d = b² - 4ac = (-9)²-4×1×0 = 81 -0 = 81

real and equal roots