Can anyone help me with these two math problems

there were five questions on my math homework and I was a little lucky to get 3/5. But my math teacher always gives us a second try to submit it. what i'm learning is Gcfs and prime factorizations. now I have two problems i got wrong which were



15x^2 - 18x and

8x^2 - 16x + 12

they are asking me what the gcf is and i answered 9x for the first one and 4x for the second. so can anyone help me to do this. it's not do till tomorrow. Thank you.

42

..........

for which problem?

I love lions said:

for which problem?

Click to expand...

both? :idontknow:

I don't know if that's it. But thanks for trying to answer.

well its been a while since I did this but I think

1) GCF=3x and I would re-write as 3x(5x-6)

and

2) GCF=4 and I would re-write as 4(2x^2-4x+3)


Hope that's the right answer for you eep Good luck

Thank you everyone! I submitted my homework and i got them all correct.

I love lions said:

there were five questions on my math homework and I was a little lucky to get 3/5. But my math teacher always gives us a second try to submit it. what i'm learning is Gcfs and prime factorizations. now I have two problems i got wrong which were



15x^2 - 18x and

8x^2 - 16x + 12

they are asking me what the gcf is and i answered 9x for the first one and 4x for the second. so can anyone help me to do this. it's not do till tomorrow. Thank you.

Click to expand...

My math might be a little rusty.. but here's my try:

Let's do 15x^2-18x first,

If you're having trouble with the variables, you can start with looking at the numbers first and then look at the variables. (i.e. look at what's the greatest common factor between 15 and 18, then look at the greatest common factor between x^2 and x)

15x^2-18x

3x(5x-6), I would say the first one is 3x.

For 8x^2-16x+12

only two terms have the variable x in them, and since there are three terms, it's definitely not a common factor, so just focus on the numbers.

12 is divisible by 4, 3, 2,1,6. 8 is divisible by 4,2,1,8. 16 is divisible by 4,8,2,1,16. Look through these numbers and see the highest number that they have in common.

4(2x^2-4x+3), so the answer would be 4

You can check to see if these are the highest common factors by seeing if you can further factorize the equations, in both cases you can't so I believe that's correct...

I love lions said:

Thank you everyone! I submitted my homework and i got them all correct.

Click to expand...

it was 42, wasn't it? :thumbup:

coyote said:

it was 42, wasn't it? :thumbup:

Click to expand...

Of course, it's the answer to life, the universe and everything