Question

I need help! It would be appreciated :D
How do I find the x intercepts of the function?
f(x) = –16x^2 + 60x + 16

Part A: What are the x-intercepts of the graph of the f(x)? Show your work.

Answer 1

Try using Geogebra

Answer 2

But... but... okay.. If anyone can help me here that would be great.

Answer 3

i can help

Answer 4

do you still need it?

Answer 5

YES!!!!

Answer 6

ok so first you want to factor the expression

Answer 7

remembering that you need to factor out the GCF out also

Answer 8

the gcf is -8 right? And my computer is slow, sorry

Answer 9

no problem. the GCF is not -8, give it another shot

Answer 10

oh crap, I googled it and was looking at the wrong problem -_- damn.... Soo, would it be 4??

Answer 11

-4

Answer 12

so now take that out and factor the rest

Answer 13

oh..... is that it?

Answer 14

no

Answer 15

i am walking you through it

Answer 16

du, sorry, Im really tired.

Answer 17

so factor that out

Answer 18

and send me your answer for that

Answer 19

when you factor out the gcf its 4x^2+15x+4 right? And I suck at factoring...

Answer 20

no when you factor it out it is -4(x-4)(4x+1)

Answer 21

do you understand how i got there?

Answer 22

somewhat.... Not really. Im really bad at algebra, Im so sorry.

Answer 23

ok so I factored out the GCF

Answer 24

right?

Answer 25

right, I think. Yeah. Did you do more than that?

Answer 26

yes, then i factored out the rest

Answer 27

okay... that makes sense... So what is it when you just take out the gcf? Sorry, im trying to understand it better....

Answer 28

it goes from –16x^2 + 60x + 16
to--->4x^2-15x-4

Answer 29

then you want to factor 4x^2-15x-4

Answer 30

I have to leave now

Answer 31

but ill post what you do after you factor it

Answer 32

then you want to set the GCF and the stuff in the parenthesis equal to 0

Answer 33

and you should get 4, 4, and -1/4

Answer 34

Okay, thank you :) I appreciate it!