Question

If x = -2, then x 2-7x+10 equals
a. 0
b.20
c.28

Answer 1

C. 28

Step-by-step explanation

The given expression is

`{x}^(2) - 7x + 10`

We want to evaluate this function at x=-2.

We just have to substitute x=-2 into the given expression.

In other words, we have to replace x with -2 wherever we see x in the expression

`{( - 2)}^(2) - 7( - 2) + 10`

We evaluate the exponent to get

`4 - 7( - 2) + 10`

We multiply next to get:

`4 + 14+ 10`

We now add to obtain:

`28`

The correct answer is C