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anonymous
 one year ago
What is the remainder when (x3 − 6x2 − 42x + 79) is divided by (x + 5)?
anonymous
 one year ago
What is the remainder when (x3 − 6x2 − 42x + 79) is divided by (x + 5)?

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welshfella
 one year ago
Best ResponseYou've already chosen the best response.2use reminder theorem The remainder when P(x) is divided by (x  a) = f(a)

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2so here you need to find P(5)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i tried plugging in 5, but i kept getting numbers that weren't in the answer choices

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2(P(x) is your polynomial)

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2oh maybe the choices are all wrong i'll see what i get

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2f(5) = 125  150  (42*5) + 79

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0thats one of the answer choices! and i was doing +150 idk why lol oops

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0can you help me with one more

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Describe the graph of the function f(x) = x3 − 11x2 + 36x − 36. Include the yintercept, xintercepts, and the end behavior.

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2well the yintercept occurs when x = 0 so find f(0) and you get that one

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0okay, is the end behavior down?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0and i got 36 for the yintercept

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2its been a while since i did end behaviours fo find the x intercepts we need to solve x^3 11x^2 + 36x  36

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So set it equal to 0?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2as the last number is 36 we could try 2,3 and 6 to see if they are roots

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Can there be more than one answer when you do that tho

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2f(2) = 8  44 + 72  36 = 0 yes x=2 is one xintercept

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i think they all work

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2yes they do thats is pure luck!!!!

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I think the end behavior is down because it hits x at 3 points

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2normally i would divide the polynomial by x  2 and try to factor the quotient

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2no i dont think we can say that as the last zero is 6 try finding f(7) and f(8) and see if they are increasing or decreasing

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2f(7) = 20 f(8) = 60 so end behaivour is increasing

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yay! thank you so much!

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2i'll draw the graph on my calculator to confirm

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2yep it looks somthing like dw:1438439995445:dw

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2yea its always worth doing a check on factors of the last number especially if its a composite number like 36
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