Question

5. Multiply 7z^3(2z^2-4z).
A.14z^5-28z^4
B. 9z^5-11z&4
C. 14z^6-28z^4
D. -14z

Answer 1

do you know how to multiply exponential terms?

eg a^2 * a^3 = a^(2+3) = a^5

Answer 2

Yes

Answer 3

Ok you need also to know the distributive property
a(b + c) = ab + ac

apply these 2 rules and you have the answer
(OH - you need to know how to multiply numbers as well!)

Answer 4

Oh okay thank you give me one second!

Answer 5

@welshfella I would add 3 and 2 right?

Answer 6

@DopeBoyDee

Answer 7

I've gotten \[14z^5 \]

Answer 8

But that's not the final answer

Answer 9

Wait its A

Answer 10

14z^5 is correct for the first term

Answer 11

and second term = 7z^3 * -4z

Answer 12

3z^3?

Answer 13

= -28z^4

Answer 14

OHHH wait multiply right

Answer 15

yes

Answer 16

Thank you!

Answer 17

-Yes - dont forget the Distriuutive Property

Answer 18

Right