Answer:
v = - 7 ± 2
Explanation:
(v + 7)² - 12 = 0 ( add 12 to both sides )
(v + 7)² = 12 ( take square root of both sides )
v + 7 = ± = ± 2 ( subtract 7 from both sides )
solutions are v = - 7 - 2 , - 7 + 2
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