Write the expression as a logarithm of a single expression.

Log 5 + Log 8 - Log 4 = Log ?

Write the expression as a logarithm of a single expression.

Log 5 + Log 8 - Log 4 = Log ?

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Middletown, CT

Hi Keith;

Should we begin with the + or -.

Let's remember the algebraic order of operations...

Parentheses

Exponential

Multiplication

Division

Addition

Subtraction

The acronym for this is PEMDAS...*Please excuse my Dear Aunt Sally.*

The Aunt (addition) comes before Sally (subtraction).

We will begin with addition.

Log 5 + Log 8 - Log 4 = Log ?

log 5 + log 8

Let's apply the principle...

log ab=log a + log b

log [(5)(8)]

log 40

log 40 - log 4

Let's apply the principle...

log a/b=log a - log b

log (40/4)

log 10

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