Question

What is the sign of − 4 a b −4ab when a > 0 a>0 and b < 0 b<0?

Answer 1

the answer is on top of me

Explanation:

my mom is angry at me and im bored

Answer 2

The sign is positive.

Explanation:

a > 0 and b < 0

So, a·b < 0

⇒ -4·a·b > 0

⇒ -4·a·b - 4·a·b > 0

Hence, the sign will be positive