Question

Are x=-5 and x=9 solutions to x^2-4x-45=0. please show the work. thanks

Answer 1

\[x^2-4x-45=0\]
\[(-5)^2-4(-5)-45=0\]
\[25+20-45=0\]
\[45-45=0\]
\[0=0\]
So, the first one looks good! :)

Answer 2

\[x^2-4x-45=0\]
\[(9)^2-4(9)-45=0\]
\[81-36-45=0\]
\[45-45=0\]
\[0=0\]
And the second one looks good too! :)

Answer 3

Did that make sense?

Answer 4

ello?

Answer 5

Yes, Thank you!