Question

factor completly
49c^2+64-112c

Answer 1

Rewrite it in descending order

Answer 2

49c^2 - 112c + 64
There is no common factor so try to factor it as ( )( )

Answer 3

so it would be then what i dont get itwould it be (49c^2)-(112c+64)

Answer 4

When I see 49 I think of 7 times 7. And when I see 64 I think of 8 times 8. So try those and see if you get 112c for the middle term.

Answer 5

(7c-8)(7c-8)

Answer 6

Useless, quit trying to live up to your name. This is a factoring problem

Answer 7

why dont i get it its probably right infront of me, you both are helping me

Answer 8

It is very difficult to have two people trying to teach you something at the same time using two different methods. I will leave you to the capable hands of UselessMass.

Answer 9

oh my god will one of you just help me with this problem and not fight

Answer 10

Mertsj you said that when you see 49 you think of 7*7 which = 49 so i would write (49)(64)=112 am i somewhat on the right track

Answer 11

thank you , i need to learn
lol

Answer 12

So do you understand now?

Answer 13

so the formula is ax^2+bx+c=0
so in this case it would be
49^2+64=112 right?

Answer 14

im sorry it would be 49^2+64x+112=0right

Answer 15

u lost me

Answer 16

yeah mertsj probably best you take over I don't have time to explain this I was hoping he had a grasp on the quadratic formula. Sorry for intruding.

Answer 17

\[49c ^{2}-112c + 64\] is a trinomial. Trinomials come from multiplying two binomials. So
\[49c ^{2}-112c + 64\]= (7c )(7c ) Both signs have to be negative since 112c is negative and the 64 if positive. Are you with me so far?

Answer 18

im not a he , i kinda of do but im not good with it that much

Answer 19

Now we have to find numbers whose product is 64. I think of 8 times 8. Do you?

Answer 20

yeah so the begin is going to be (7c )(7c )

Answer 21

Yes.

Answer 22

yes 8 and 8 is 64

Answer 23

so let's try that. (7c-8)(7c-8). Now do you know what FOIL means?

Answer 24

it would be 49c-64 right

Answer 25

Do you know what FOIL means?????

Answer 26

kinda let me be honest im not good at math sorry

Answer 27

So just say no. It's ok.

Answer 28

Could you multiply (x+3)(x-8)

Answer 29

it wil come out to be a - right , if not then it will be 24

Answer 30

So now I understand why you are having so much trouble with factoring. To multiply two binomials such as (x+3)(x-8) multiply the First term of each binomial. In this case it would be x times x which is x^2. That's where the F in FOIL comes from. Are you with me so far?

Answer 31

yes

Answer 32

Now multiply the Outer terms which are x and -8. That gives you -8x. That is where the O of FOIL comes from. Still with me?

Answer 33

Now multiply the Inner terms which are 3 and x. That gives you 3x. That is where the I of FOIL comes from. I will wait to see if you understand so far or not.

Answer 34

yes

Answer 35

so i have x-8 and x-3 right

Answer 36

Now multiply the last terms of each binomial which are 3 and -8. That gives you -24.That is where the L of FOIL comes from.

Answer 37

alright it would be -24

Answer 38

So now we have x^2 -8x+3x-24 or if we add -8x + 3x we get x^2-5x -24.

Answer 39

Yes. Very Good.

Answer 40

So now we have a trinomial: x^2-5x -24. Suppose the directions said "Factor Completely." We would have to reverse the process of multiplication that we just did and write it as a product.

Answer 41

huh

Answer 42

(x+3)(x-8) = x^2 -5x -24

Are you still with me? If not, where did you get lost?

Answer 43

i am but i will be right back i have to pick up someone up from work,dont go on yet

Answer 44

Let me know when you are back.

Answer 45

alright iht im back

Answer 46

so where do i go from tthere