SOLUTION: solve the equation 4s^2 + 36s + 81 = 0

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Question 673121: solve the equation 4s^2 + 36s + 81 = 0
Answer by nerdybill(7384) About Me  (Show Source):
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solve the equation 4s^2 + 36s + 81 = 0
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4s^2 + 36s + 81 = 0
4s^2 + 18s + 18s + 81 = 0
(4s^2 + 18s) + (18s + 81) = 0
2s(2s + 9) + 9(2s + 9) = 0
(2s + 9)(2s + 9) = 0
(2s + 9)^2 = 0
s = -9/2 = -4.5