Question

NEED TO

Answer 1

Have you tried anything so far ?

Answer 2

no
you?

Answer 3

Me neither
I slack way more than you haha

Answer 4

what are the steps I can take to solve this?

Answer 5

Before answering that, may I know what you have tried so far ?

Answer 6

I haven't tried anything bc i don't know how to solve it... i don't even know the steps

Answer 7

So you're completely clueless

Answer 8

sort of, yes thats why I cam here

Answer 9

Are you skipping lessons or do you really have a terrible teacher ?

Answer 10

i don't know how to find the given zeros.. would I plug those 3 into a quadratic formula? ad bad teacher honestly but I am learning through Khan academy so thats helping a bit, and I can independent study

Answer 11

I am taking 3 grade levels ahead of me for math so I am ahead of the rest of my grade and I am learning pre-calc just for fun over summer

Answer 12

and doing practice problems

Answer 13

Awesome!
Let's see how to solve this problem

Answer 14

ok great, thanks!

Answer 15

@ganeshie8 anyone? no one ever helped me haha

Answer 16

@jhonyy9 @satellite73

Answer 17

Review the problem, First you are not asked to solve the zeroes for this cubic. They have provided them for you.

Answer 18

zeros , x-intercept or solution is a point where graph intersect the x-axis given zeros or x values are
sqrt{5} . -sqrt{5} , -7
that means \[x = \sqrt{5} ,~~~x= -\sqrt{5} ~~~, x=-7\]
set each equation equal to 0

Answer 19

so I add them together in an equation that equals 0 and then use quadratic formula?

Answer 20

These are the points where f(x) = 0, They are:\[(-\sqrt{5}),0\]\[(\sqrt{5}),0\]and (-7,0) as Nnesha as shown.

Answer 21

oh ok, so-squareroot 5 would be a in the quadratic formula, squarer 5 would be b, and -7 would be C?

Answer 22

No you convert those points to factors (three zeroes, as it is a cubic function.

Answer 23

you need a quadratic equation for the quadratic formula..
given x = sqrt{5}
subtract qrt{5} both sides
\[(x-\sqrt{5})= 0\]
this is one of the factorz

Answer 24

^ @inkyvoyd why

Answer 25

haha ok, I will make sure to :-) @inkyvoyd

Answer 26

sorry about your unpleasant experience with someone from the school @inkyvoyd

Answer 27

@Nnesha so, what could i do next ? I'm writing the steps in my notebook for future reference

Answer 28

@inkyvoyd where'd u go

Answer 29

try looking up the fundamental theorem of algebra ;)

Answer 30

@inkyvoyd a european school??

Answer 31

\[(x-\sqrt{5})=0\]
\[x=-\sqrt{5} ~~~,~~~x= -7 \]
set it equal to zero

Answer 32

and then how would I solve that?

Answer 33

@Nnesha

Answer 34

I know this is a lot to be asking of you , but it would REALLY help me study. Could you please write out your steps in one post?

Answer 35

@Nnesha
:-)

Answer 36

@inkyvoyd ?

Answer 37

anyone please?

Answer 38

hii

Answer 39

sorry was afk

Answer 40

alright set other two solutions(zeros, x-intercepts) equal to zero
here is an example!
x=2 , x = -3 ,x=1

x=2 ---> x-2 = 0
x=-3----> x+3 =0
x=1----> x-1=0
f(x) = (x-2)(x+3)(x-1)
multiply this out