Question

What polynomial has roots of -4, 2, and 5 ?
a. x3 - x2 - 22x + 40
b. x3 + x2 - 22x - 40
c. x3 + 3x2 - 18x - 40
d. x3 - 3x2 - 18x + 40
Which of the following is a polynomial with roots -3, -3i, and 3i ?
a. x3 + 3x2 + 9x + 27
b. x3 - 3x2 + 9x - 27
c. x3 + 9x2 + 9x + 81
d. x3 - 9x2 + 9x - 81
What are the possible number of negative zeros of f(x) = -2x7 - 2x6 + 7x5 - 7x4 + 4x3 + 4x2 ?
a. 7, 5, 3, or 1
b. 3 or 1
c. 2 or 0
d. 2

Answer 1

HI!!

Answer 2

Hi!

Answer 3

first one, multiply \[(x+4)(x-2)(x-5)\]

Answer 4

I dont know how

Answer 5

then you can't do it

Answer 6

but you can cheat
http://www.wolframalpha.com/input/?i=%28x%2B4%29%28x-2%29%28x-5%29

Answer 7

second one multiply \[(x+3)(x^2+9)\]
if you don't now how, cheat like i showed you

Answer 8

Okay i did

Answer 9

What do i do to find the zeros? @misty1212