Question

simplify completely 5x^2+9x-2/x^2+12x+20*x^2+17x+70/15x-3

Answer 1

Please help, i dont know how

Answer 2

i dont get it...

Answer 3

the whole thing, can you walk me threw it?

Answer 4

yeah

Answer 5

Can you tell me if the expression you are trying to simplify is a series of single terms? or does it have a numerator or denominator with multiple terms?

Answer 6

ohh okay, the answers are x+7/3(x+10), x+2/3(x+10), x+10/3 and x+7/3

Answer 7

one of those is the answer

Answer 8

PLEASE HELP

Answer 9

Ok, I think this is your problem ( which we will solve) Parenthesis and grouping matters

(5x^2+9x-2)/(x^2+12x+20) * (x^2+17x+70)/(15x-3)

Answer 10

So, for your first fraction. Factor numerator and denominator and you get
\[[(5x-1)(x+2)]/[(x+10)(x+2)]\]
Now, see the (x+2) can cancel?

Answer 11

Oh okay im sorry i didnt know because its not written how i typed it like because my computer wouldnt let me

Answer 12

So we are left with
(5x-1)/(x+10)

For the second fraction, we again factor and get
\[[(x+10)(x+7)]/[3*(5x-1)]\]

Answer 13

okay

Answer 14

Multiplying across, our new numerator is
(5x-1)(x+10)(x+7)

And our new denominator is
(x+10)(5x-1)*3

And now we can cancel the (5x-1) and the (x+10) and we are left with
(x+7)/3

Answer 15

It's ok, does this help?

Answer 16

yes thank you so much!!! do you think you can help me with one more question?

Answer 17

Is it the other one you have posted? I think it'll be a similar grouping confusion... meet you over there

Answer 18

haha yeah

Answer 19

no x^2+x-12 i mean that