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Mathematics 10 Online
jagr2713 (jagr2713):

Help Please

jagr2713 (jagr2713):

http://prntscr.com/4nuf3j i jut need 2&3 please @AccessDenied @Compassionate @e.mccormick @jim_thompson5910 @tkhunny @radar

jagr2713 (jagr2713):

@Ashleyisakitty

jagr2713 (jagr2713):

@Compassionate can you please help

jagr2713 (jagr2713):

@tkhunny please help D:

OpenStudy (tkhunny):

(6,0), (-2,0), (-7,0) Okay, what polynomial did you construct?

jagr2713 (jagr2713):

f(x) =x^3 + x^2 -28x -12x - 84

OpenStudy (tkhunny):

I thought so. That's no good. Read the description again and decide what is missing. Maybe it's important to know which way the roller coaster is going. Left-to-right or right-to-left?

OpenStudy (tkhunny):

I'm assuming the roller-coaster is traveling left-to-right. s/b f(x) = -x^3 - 3x^2 +40x + 84 How is this different from yours? (Ignore the 3x^2 - That was just a multiplication error)

jagr2713 (jagr2713):

i was wrong is it

jagr2713 (jagr2713):

f(x) = (x - 6)(x - (-2))(x - (-7)) ......= (x - 6)(x + 2)(x + 7) ......= (x - 6)(x^2 + 9x + 14) ......= x(x^2 + 9x + 14) - 6(x^2 + 9x + 14) ......= x^3 + 3x^2 - 40x - 84

jagr2713 (jagr2713):

I did it thx for trying :D

OpenStudy (tkhunny):

You did NOT do it if that is your f(x). It is upside-down. You need what I wrote.

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