Question

The expression -2a(b - 4) is equal to which of the following expressions?
-2ab + 8a
-2ab + 8
-2ab - 8a
2ab + 8
2ab + 8a

Answer 1

You have to multiply -2a by each Number/variable in the ( ) parenthesis

Answer 2

So would my answer be -2a + 8?

Answer 3

Close...-2a X b = ?

Answer 4

and -2a x 4 = ?

Answer 5

I'm confused on how to do -2a x b =
-2a x 4 = 8a?

Answer 6

-2a x b = -2ab -2a x -4 = 8a Numbers you multiply together letters you just increase the power of or if different letters just add to the line

Example 2a (4a + 6b -3) = 8a^2 + 12ab -6a

2a x 4a = 8a^2
2a x 6b = 12ab
2a x -3 = -6a