When x3+3x2-2x+7 is divided by x+1, the remainder is :

7
8
9
11
13

Question

When x3+3x2-2x+7 is divided by x+1, the remainder is :

7
8
9
11
13

amistre64 · Answer

runthe synthetic division

austinl · Answer

Aye, good plan. I was trying to get something to work... but it seems it isn't possible on this site.

amistre64 · Answer

x^3 +3x^2 -2x +7
       0       -1      -2    etc...
     --------------------
-1 )  1       2       -4

loser66 · Answer

my prof taught me that just plug -1 into the equation, the result is the remainder of the problem. I got 11

amistre64 · Answer

whats the remainder when its divided by x-57 then  :)

loser66 · Answer

the same, put x = 57 and calculate the result

amistre64 · Answer

if its a calculator setup .... thats fine too,  but if by hand id rather stick with adding and multiplying

loser66 · Answer

but it's the fastest way to figure out the remainder, right?

amistre64 · Answer

depends on what yo have to work with at your disposal

loser66 · Answer

ok, got what you mean.