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Use synthetic division to find P(2) for P(x) = x^4 + 3x^3  6x^2  10x + 8
Choices :)
A.) 2
B.) 28
C.) 4
D.) 16
 one year ago
 one year ago
Use synthetic division to find P(2) for P(x) = x^4 + 3x^3  6x^2  10x + 8 Choices :) A.) 2 B.) 28 C.) 4 D.) 16
 one year ago
 one year ago

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jim_thompson5910Best ResponseYou've already chosen the best response.1
You don't need synthetic division really. You can just plug in x = 2 and evaluate.
 one year ago

Brooke2013Best ResponseYou've already chosen the best response.0
what does it have to equal to ?
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.1
P(x) = x^4 + 3x^3  6x^2  10x + 8 P(2) = (2)^4 + 3(2)^3  6(2)^2  10(2) + 8 P(2) = ???
 one year ago

Brooke2013Best ResponseYou've already chosen the best response.0
I got 76 ? that's not a choice
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.1
P(2) = (2)^4 + 3(2)^3  6(2)^2  10(2) + 8 P(2) = 16 + 3(8)  6(4)  10(2) + 8 P(2) = 16 + 24  24  20 + 8 P(2) = 4
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.1
not sure where you went wrong, but I'm guessing you lost a sign somewhere
 one year ago

Brooke2013Best ResponseYou've already chosen the best response.0
so you don't do the exponents ?
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.1
what do you mean by "do exponents"?
 one year ago

Brooke2013Best ResponseYou've already chosen the best response.0
Like if you do 2^4 is 16 and 3(2) ^3 is 216 and 6(2) ^2 is 144 and 10(2) is 20 that's how I got 76 I added 16 + 216  144  20 + 8
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.1
you do 3(2)^3 = 3(8) = 24 NOT 3(2)^3 = 6^3 = 216 because exponents come before multiplication in PEMDAS
 one year ago

Brooke2013Best ResponseYou've already chosen the best response.0
O, ok thanks so much for explaining :) it makes more since now
 one year ago
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