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What are the solutions to (x+7)^2=81

What are the solutions to (x+7)^2=81
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3 votes
What are the solutions to (x+7)^2=81

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User Pisomojado
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8.3k points

2 Answers

3 votes

(x + 7)² = 81

x + 7 = √81

x+7 = 9

x = 9 - 7

x = 2

answered
User Marc Charbonneau
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8.3k points
0 votes


(x+7)^2=81\iff x+7=\pm√(81)\\\\x+7=-9\ \vee\ x+7=9\qquad\text{subtract 7 from both sides}\\\\\boxed{x=-16\ \vee\ x=2}

answered
User Sheridan
by
7.7k points
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