Question

Can someone take me step by step on how evaluating this expression and finding variable?

7/x^2-5x+4

x=-1

Answer 1

replace \(x\) by \((-1)\)
use the parentheses, since it is a negative number

Answer 2

you should get
\[\frac{7}{(-1)^2-5\times (-1)+4}\]

Answer 3

Yes, this is what I have so far.

Answer 4

then you compute the number

\[\frac{7}{(-1)^2-5\times (-1)+4}\]
\[=\frac{7}{1+5+4}=\frac{7}{10}\]

Answer 5

And that is it?

Answer 6

wow, easier than I thought