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| PAGE: 489 | SET: Exercises | PROBLEM: 2 |
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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