Got two answers for this -6 and -1 Its -1 but why isn't it also -6?logbase2(x+2) + logbase2(x+5) = logbase2(4)

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HOME > Mathematics > Got two answers for this -6 and -1 Its -1 but why isn't it also -6?logbase2(x+2) + logbase2(x+5) = logbase2(4)

Got two answers for this -6 and -1 Its -1 but why isn't it also -6?logbase2(x+2) + logbase2(x+5) = logbase2(4)

[From: ] [author: ] [Date: 11-05-07] [Hit: ]

only -1 is valid-Because if x = -6, (x + 2) = -4, and (x + 5) = -1.Logarithms only apply to positive numbers, not negative ones.-Because you cant take log of negative number.......

when x = -6

log(x + 2) = log(-4) and log (x + 5) = log(-1)

Since log of negative numbers is not defined, -6 is not valid one. only -1 is valid

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Because if x = -6, (x + 2) = -4, and (x + 5) = -1.

Logarithms only apply to positive numbers, not negative ones.

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Because you can't take log of negative number.

1

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