How do you simplify and find the excluded values for $\frac{9}{15 a - 15}$ $9/(15a-15)$ ?

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Answer 1 · 2018-03-28T19:17:13

$\frac{3}{5 (a - 1)}$ $3/(5(a-1))$

Look for things you can cancel out.

Write as: $\frac{9}{15 (a - 1)}$ $9/(15(a-1))$

Divide top and bottom by 3

$\frac{3}{5 (a - 1)}$ $3/(5(a-1))$

We 'are not allowed' to have a 0 as the denominator of a fraction. The official name for this condition is that it is 'undefined'.

So the excluded value is $a = 1$ $a=1$

$\frac{3}{5 (1 - 1)} \to \frac{3}{5 \times 0} = \frac{3}{0} \leftarrow Undefined$ $3/(5(1-1))->3/(5xx0)=3/0 larr" Undefined"$

How do you simplify and find the excluded values for 915a−159/(15a-15)?