Question

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

Answer:

${x}^{2} = 9 \\ x = \sqrt{9} \\ x = 3$

x=+3

×=-3

Answer 2

Answer:

x² = 9

x = +-√( 9) = +-3

x = 3 or x = -3 is the root of the given equation