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blahblah_who_cares
 3 years ago
Find the remainder if P(x)=x^3+17 is divided by (x+2).
blahblah_who_cares
 3 years ago
Find the remainder if P(x)=x^3+17 is divided by (x+2).

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blahblah_who_cares
 3 years ago
Best ResponseYou've already chosen the best response.0The answer is 9, but I dont understand how to get it.

Directrix
 3 years ago
Best ResponseYou've already chosen the best response.1@blahblah_who_cares Have you studied synthetic division or the Remainder Theorem?

blahblah_who_cares
 3 years ago
Best ResponseYou've already chosen the best response.0No. Just synthetic. And I might have learned Remainder but I dont recall anything like it. .

dumbcow
 3 years ago
Best ResponseYou've already chosen the best response.0for (x+2) evaluate f(2) to get remainder

Directrix
 3 years ago
Best ResponseYou've already chosen the best response.1We can do either here. I will post the Remainder Theorem so that you can tell me if you've ever seen it. Regardless, we will do the problem but will use the method you have studied. Tell me which method after you look at this remainder theorem. Remainder Theorem If a polynomial P( x) is divided by ( x – r), then the remainder of this division is the same as evaluating P( r), and evaluating P( r) for some polynomial P( x) is the same as finding the remainder of P( x) divided by ( x – r).

blahblah_who_cares
 3 years ago
Best ResponseYou've already chosen the best response.0Yah. Ive never learned Remainder Theorem. @Directrix

Directrix
 3 years ago
Best ResponseYou've already chosen the best response.1We'll do synthetic division.

Directrix
 3 years ago
Best ResponseYou've already chosen the best response.1P(x)=x^3+17 is divided by (x+2) P(x) = x^3 + 0x^2 + 0x + 17 divided by (x + 2) dw:1360114222669:dw

Directrix
 3 years ago
Best ResponseYou've already chosen the best response.1Does that look familiar?

blahblah_who_cares
 3 years ago
Best ResponseYou've already chosen the best response.0Ok. So i think my big question here is how to get the 2.

Directrix
 3 years ago
Best ResponseYou've already chosen the best response.1dw:1360114478786:dw

Directrix
 3 years ago
Best ResponseYou've already chosen the best response.1Consider this example: Example 1 Find P(–3) if P( x) = 7 x5 – 4 x3 + 2 x –11. There are two methods of finding P(–3). • Method 1: Directly replace –3 for x. • Method 2: Find the remainder of P( x) divided by [ x – (–3)].

blahblah_who_cares
 3 years ago
Best ResponseYou've already chosen the best response.0No. I mean how did you get 2 from (x+2).

Directrix
 3 years ago
Best ResponseYou've already chosen the best response.1If the divisor is (x +2), for synthetic division, it is written as (x  (2)) which results in a divisor of (2).

blahblah_who_cares
 3 years ago
Best ResponseYou've already chosen the best response.0Oh.. Ok. thanks.
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