Question

Which of the following is a polynomial with roots 5, −6, and 7?

f(x) = x3 − 6x2 − 30x + 37
f(x) = x3 − 30x2 − 37x + 42
f(x) = x3 − 6x2 − 37x + 210
f(x) = x3 − 30x2 − 42x + 210

medals awarded to answer

Answer 1

expand \((x-5)(x+6)(x-7)\)

Answer 2

That's a good start!

Answer 3

grrr

f(x) = x3 − 6x2 − 30x + 37?

Answer 4

no way. the expansion will give you one of the choices

Answer 5

try again

Answer 6

I see the x^3 30x^2

Answer 7

42

Answer 8

f(x) = x3 − 30x2 − 42x + 210

Answer 9

start by foiling 2 of them: \((x-5)(x+6)(x-7)=(x^2++x-30)(x-7)\)

now distribute futher

Answer 10

Has to be f(x) = x3 − 6x2 − 37x + 210

Answer 11

yea

Answer 12

Thankssss

Answer 13

Can you give a medal to each other? i feel guilty

Answer 14

give them to the other guy, this isn't my main account

Answer 15

Give me main so I can fan

Answer 16

http://openstudy.com/users/bibby

Answer 17

finally got it!