Question

Evaluate the expression when y = -2

- 8y2​

Answer 1

-32

Explanation:

Replace the variable y with -2 in the expression giving -8(-2)^2

Then, square -2 giving us (positive) 4

Lastly, multiply -8 with 4 and get -32 as our answer

(Hopefully this helped you! Feel free to ask again if you need more help. Tell me if the solution is unclear to you)

Answer 2

I believe this is the expression:

`\displaystyle \large \boxed{ - 8 {y}^(2) }`

Since we want to evaluate it when y = -2, simply substitute y = -2 in the expression.

`\displaystyle \large{ - 8 {( - 2)}^(2) }`

Any negative number squared will result in positive, refer below:

`\displaystyle \large{ {( - a)}^(2) = {a}^(2) } \\ \displaystyle \large{ {( - 2)}^(2) = {2}^(2) } \longrightarrow \boxed{4} \\`

Hence,

`\displaystyle \large{ - 8(4) = - 8 * 4} \\ \displaystyle \large \boxed{ -32}`