Question

-7p3(4p2 + 3p - 1)

a. -28p5 - 21p4 + 7p3
b. 28p6 + 21p3 - 7p
c. 21p3 + 8p2 + 3p4 - 8p
d. -21p5 + 8p4 - 3p3

Answer 1

Use the distributive law for multiplication over a sum.
\[-7p3(4p2 + 3p - 1) = (-7p3)\times4p2 + (-7p3)\times3p -(-7p3)\times 1\]
Can you continue from here?

Answer 2

Uhm , Kinda

Answer 3

Multiply each term. For example, for the first term:
\[(-7p^3)\times4p^2 = -28p^5\]
Can you do the other multiplications similarly? You should get A as your answer.