Question

Can you help me with this, I have been stuck on it for a little bit

Answer 1

Answer:

8 is the answer.

Step-by-step explanation:

We'll solve each part individually.

First b²,

They gave b=2, then b²=4

Then -4ac,

a is given as 4 and c is -1, then ac= a*c

=4*-1

=-4

Then we put it together, it'll be 4 -(-4)

=4+4

=8

Answer 2

$2 {}^{2} - 4 \times 4 \times ( - 1)$

$4 - 4 \times 4 \times ( - 1)$

$4 - 16$

$- 12$