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Find x if log3(x^2+4x+76)=4
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1 Answer

Find x if log3(x^2+4x+76)=4

log3(x^2+4x+76) = 4, therefore, by definition,

x^2 + 4x + 76 = 3^4 = 9^2 = 81

x^2 + 4x - 5 =​ 0

(x - 1)(x + 5) = 0

x = 1, x = -5

by Level 11 User (81.5k points)

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