Question

Solve for x. Simplify completely.
x^2-9=55

Answer 1

x= 8 x= -8

Explanation:

took the test

Answer 2

★ Exponential reduction ★


`x {}^(2) - 9 = 55 \\ x {}^(2) = 55 + 9 = 64 \\ x {}^(2) = 64 = ( + 8) {}^(2) \\ x = + 8 \\`
we didn't considered -8 because square root of any real number is always positive , or it's yours choice to deal with minus 8 also :)

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