SOLUTION: Help!! Solve. let f(x) = (x + 10)^2. Find x so that f(x) = 72

SOLUTION: Help!! Solve. let f(x) = (x + 10)^2. Find x so that f(x) = 72

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Question 298409: Help!!
Solve.
let f(x) = (x + 10)^2. Find x so that f(x) = 72

Answer by chibisan(131) (Show Source): You can put this solution on YOUR website!
Combine both functions together,
(x + 10)^2 = 72
x + 10 = +- sqrt(72)
x = +- sqrt(72) - 10
x = -1.51 , -18.5 ( 3 significant figures.)
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