Math Help @jdoe0001 @agent0smith @Compassionate @kropot72 @thomaster

Question

Math Help @jdoe0001  @agent0smith @Compassionate @kropot72 @thomaster

anonymous · Answer

attachment

anonymous · Answer

@happinessbreaksbones

myininaya · Answer

If x=a is a zero, then x-a is a factor
It also works the other way around too
If x-a is a factor, then x=a is a zero.

anonymous · Answer

so is 1 c or a im not sure

anonymous · Answer

i mean 5 is 1

myininaya · Answer

x=a is a zero means f(a)=0
what is a in your first question?

anonymous · Answer

so the first one is c @myininaya ?

myininaya · Answer

Yes.

myininaya · Answer

Now looking at the second question.
Lets find the number of sign changes for f(x)
then lets find the number of sign changes for f(-x)

anonymous · Answer

okay for the second one i got a i have 2 more questions can you help me with those after ?

anonymous · Answer

@myininaya you there?

myininaya · Answer

Yes a is right. I have to be right back.

anonymous · Answer

okay ill post teh other two and when you come back

myininaya · Answer

what do you notice about 64 and 8?
what do they have in common?
Does anything you notice about 64 and 8 have anything to do with your options given?

anonymous · Answer

they are both divisiable by 8 8*8 =64

myininaya · Answer

notice your options have the words cube and squares
are both of these numbers perfect squares or cubes?

anonymous · Answer

perfect suqares?

myininaya · Answer

ok put we have 64+8 and there isn't an identity for the sum of squares over the real numbers
also there is no complex option listed anyways
so what about cubes?
are 64 and 8 perfect cubes?

anonymous · Answer

no is it d?

myininaya · Answer

so 4^3 isn't 64?
and 2^3 isn't 8?

anonymous · Answer

yea lol i didnt notice that so its sum of cubes c?

myininaya · Answer

yea
I would say that looks good.

anonymous · Answer

okay now the last one

myininaya · Answer

But also I haven't seen polynomial identities used to prove such things.
For the last one, what do you think the answer is?

myininaya · Answer

look at the side expressed in two terms

anonymous · Answer

a or b

myininaya · Answer

we don't have a difference

myininaya · Answer

difference means subtraction

anonymous · Answer

ohh okay so its c

myininaya · Answer

yes
other examples:
4-1=3
2^2-1^2 is a difference of squares 
25-16=9
5^2-4^2 this is a difference of squares
27-8=19
3^3-2^3 is a difference of cubes

anonymous · Answer

ohh okay i need help with some worded problems i dont get at all like i dont understand the can you help me?