Question

help?!

Answer 1

Do you know how to factor x^2 + 10x + 9? Or x^2 + 4x - 45? if so, do that first

Answer 2

\[\frac{ x ^{2}+4x-45 }{ x ^{2}+10x+9 }\]

Factor top and bottom
\[\frac{ (x+9)(x-5) }{ (x+9)(x+1) }\]
Cancel both (x+9)
\[\frac{ x-5 }{ x+1 }\]

To find the restrictions set (x+9) and (x+1) to 0 and solve for x
\[x+9\neq 0 \]
\[x \neq -9\]

\[x+1 \neq 0\]
\[x \neq -1\]

So A