We need to see the graph to be able to answer the question
F(-7)=0
Because that makes the (x+7) factor equal zero and any other factor multiplied by zero also results in zero.
Substitute each value until the answer is correct
a. 1 = -4 x -5 -1
1 does not equal 19
b. 15 = -4 x 4 -1
15 does not equal -17
c. -5 = -4 x 1 -1
-5 equals -5
just to make sure the last answer is incorrect
d. -7 = -4 x 2 -1
-7 does not equal -9
The answer is:
A solid and a plane.
Answer:
x+5 (under assumption you meant to do -3x
Step-by-step explanation:
you can use long division.
Take the leading coefficient x^4 and divide it by x^3. This results in x which is going to be the first part of you quotient. Now take that x and multiply it by the divisor (x^3 - 3). This gives you x(x^3 - 3) = x^4 - 3x. Now subtract that x^4 - 3x from the original polynomial and repeat this until you can't divide anymore
![x^4+5x^3-3x-15 - (x^4-3x) = 5x^3-15\\x^3/5x^3=5\\5(x^3-3) = 5x^3-15\\5x^3-15-(5x^3-15) = 0\\\\x+5](https://tex.z-dn.net/?f=x%5E4%2B5x%5E3-3x-15%20-%20%28x%5E4-3x%29%20%3D%205x%5E3-15%5C%5Cx%5E3%2F5x%5E3%3D5%5C%5C5%28x%5E3-3%29%20%3D%205x%5E3-15%5C%5C5x%5E3-15-%285x%5E3-15%29%20%3D%200%5C%5C%5C%5Cx%2B5)