Question

Which expression is equivalent to 7-2z-4(z^3-z^3+4z^2+11z+14/z+2)?

a. -4z^3+4z^2+6z+35
b. -4z^3+4z^2-10z-21
c. -18z-5
d. -18z+10

Answer 1

A

Explanation:

correct on edge 2021

Answer 2

The answer to your question is: letter A

Explanation:

7 - 2z - 4(z³ - (z³ +4z² + 11z +14)/z + 2)

The result of the division was x² -2x + 7, then

7 - 2z - 4(z³ - z² + 2z - 7)

7 - 2z - 4z³ + 4z² - 8z + 28

-4z³ + 4z² - 10z + 35

Synthetic division

1 4 11 14 -2

-2 -4 -14

1 2 7 0

then = z² - 2z + 7