Question

If a=4, what is the value of `4a^2-7a-1`?

Answer 1

35

Explanation:

You have to replace a by 4.
[1]`4*4^2-7*4-1`
[2]`4*16-28-1`
[3]`64-29`
[4]`35`
\o/ here's the answer !