For (polynomial)/(x-constant)
do
constant | coefients of polynomial
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if write 1 for every power, if a power is missing, write 0 tehre
this is kind of complicated
so what you do is start at the top, at the first number inside that wierd thing
bring it down below the line
multiply the left number
move it up and right 1 collumn
add that collumn, and write the sum below the line
repeat
so for yours
(x-4) so the constant outside is 4
so
4|1 13 -64 -20 16
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bring down the first row thing
4|1 13 -64 -20 16
|_______________
1
multily by 4 and move up and right
4|1 13 -64 -20 16
|___<u>4__________</u>
1
add
4|1 13 -64 -20 16
<u>|___4__</u>________
1 17
multiply and move
4|1 13 -64 -20 16
|__<u>_4__68_</u>_____
1 17
add
4|1 13 -64 -20 16
<u>|___4__68______</u>
1 17 4
multiply and move
4|1 13 -64 -20 16
|___<u>4__68_16_</u>__
1 17 4
add
4|1 13 -64 -20 16
|___<u>4__68_16</u>___
1 17 4 -4
multiply and movie
4|1 13 -64 -20 16
|___<u>4__68_16_-16</u>
1 17 4 -4
add
4|1 13 -64 -20 16
|___<u>4__68_16_-16</u>
1 17 4 -4 0
so the coefients 1,17,4,-4,0
and since we started with 4th degree (x^4) we minus 1 (to get x^3)
1x^3+17x^2+4x-4 and 0 remainder
2nd option is your answer
R=-7, you have to put each answer in the equation, therefore; 21=42-3(-7) So you have to do multiplication (PEMDAS, if you arent aware of that acronym then it stands for the order of what to do with an equation, Parentheses get solved first, then Exponents, then multiplication, then division, then addition, then finally subtraction. Solving in that order will solve your answer correctly.) With -3 times -7 which gives you 21. Then you do 42 - 21 which equals 21. So 21 = 21.
Answer:
Step-by-step explanation:
C
