Question

Q=2u2 - 5
(d) Find the value of Q when u=-3

Answer 1

Down below

Explanation:

`Q=2u^2-5\\u=-3\\Q=(2*-3)^2-5\\Q=(-6)^2-5\\Q=36-5\\Q=31`

Note: wasn't sure if it was
`2u^2` or 2u*2. tell me and i will change it. this also may be wrong.

Answer 2

13

Explanation:

13 is the right answer