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The equation is .
The perfect square of the given trinomial .
(Take the square root of each side)
Apply square roots property: If then .
Apply subtraction property of equality: If a = b then a c = b c.
(Subtract 7 from each side)
(Apply additive inverse property: )
Using the calculator to evaluate each value of x.
And using the calculator to evaluate square roots: .
(Simplify)
The solution set is .
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