Question

What are the roots of the quadratic equation
$x {2} = 9$
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Answer 1

Answer:

x = ±3

Step-by-step explanation:

given x² = 9

         => x² = 3²

         => x² - 3² = 0

      => (x+3)(x-3) = 0

=> either x+3 = 0 or x-3 = 0

=> either x = -3 pr x = +3

=> x = ±3