Question

which of the following is an x-intercept of the function, f(x)= x^3-5x^2-8x+48
A.4
B.-2
C.-4
D.2

Answer 1

at an x intercept f(x) = 0

so plug in the options into the expression for f(x) and see which one works out to be 0

Answer 2

for example
for x = 4 we get
(4)^3 - 5(4)^2 - 8(4) + 48 = ?

Answer 3

64 - 80 -32 + 48 = ?

Answer 4

does that come to 0? if it does you have your answer

Answer 5

I did all four and none of them equal zero unless I did it wrong

Answer 6

92
44
-28
52

Answer 7

those were my answers...

Answer 8

64 - 80 - 32 + 48
= 64 + 48 - 80 - 32
= 112 - 112
= 0

Answer 9

A is the correct option

Answer 10

ok thank you. I couldn't get it

Answer 11

yw

Answer 12

with something like this it might be easier to do all additions first then subtractions last