Question

Use the quadratic function to predict y if x equals 6.

y = 2x2 − 2x − 2

Answer 1

The value of the polynomial
`y =  2x^2 - 2x - 2` is 58 for x = 6.

Explanation:

Here, the given quadratic function polynomial is given as:

`y =  2x^2 - 2x - 2`

or,
`y(x) =  2(x^2 - x - 1)`

Now, to find the value of y, when x = 6

⇒
`y(6) =  2((6)^2 - (6) - 1)`

= 2(36 - 6 -1) = 2(29)

= 58

⇒y(6) = 58

Hence, the value of the given polynomial
`y =  2x^2 - 2x - 2` is 58 for x = 6.