calculusxy
  • calculusxy
Adding and subtracting rational expressions... MEDAL!!!
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
calculusxy
  • calculusxy
\[\large \frac{ 3 }{ 5v - 4 } - \frac{ 5v }{ v-4 }\]
calculusxy
  • calculusxy
@Hero
anonymous
  • anonymous
|dw:1449264404226:dw|

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anonymous
  • anonymous
then foil
calculusxy
  • calculusxy
\[\frac{ -25v^2 - 17v - 12 }{ 5v^2 - 16v - 16 }\]
calculusxy
  • calculusxy
@magepker728 ?
anonymous
  • anonymous
ur denominator is wrong i believe
anonymous
  • anonymous
it should be 5x^2-24x+16
calculusxy
  • calculusxy
how?
anonymous
  • anonymous
ur numerator too
calculusxy
  • calculusxy
\((5v + 4)(v - 4)\) \(5v^2 - 20v + 4v - 16\) \(5v^2 - 16v - 16\)
anonymous
  • anonymous
remember its -5v u have to distribute it
anonymous
  • anonymous
let me just do it
anonymous
  • anonymous
|dw:1449265329137:dw|
anonymous
  • anonymous
that is your numerator
anonymous
  • anonymous
for denominator |dw:1449265554724:dw|
calculusxy
  • calculusxy
Sorry but there was a typo. Here is the updated one: \[\large \frac{ 3 }{ 5v + 4 } - \frac{ 5v }{ v-4 }\]
anonymous
  • anonymous
ok what u got is correct
calculusxy
  • calculusxy
So I am having trouble factoring the numerator: \(-25v - 17v - 12\)
calculusxy
  • calculusxy
But firstly, is my numerator correct?
anonymous
  • anonymous
yes its correct
calculusxy
  • calculusxy
how do i do my factoring ?
anonymous
  • anonymous
@Hero @IrishBoy123
anonymous
  • anonymous
u cant unless u use qudratic formula
calculusxy
  • calculusxy
Why can't i complete the square ?
calculusxy
  • calculusxy
@phi
anonymous
  • anonymous
what course is this by any chance
calculusxy
  • calculusxy
algebra 1 and algebra 2
anonymous
  • anonymous
and you have to find v?
calculusxy
  • calculusxy
we need to simplify it
phi
  • phi
it does not simplify
anonymous
  • anonymous
well you cant simplify it any further unless you use quadratic formula or completing the square
anonymous
  • anonymous
and that is to find v
calculusxy
  • calculusxy
okay thank you!
anonymous
  • anonymous
therefore its already in simply form
phi
  • phi
you can factor the bottom (hopefully that is obvious) and you could factor out a minus sign from the top and make the entire fraction negative.
anonymous
  • anonymous
correct me @phi if im wrong
calculusxy
  • calculusxy
can i simplify this: \(2p^2 + 7p + 4\)
calculusxy
  • calculusxy
meaning like factor this ?
phi
  • phi
if it were -4
phi
  • phi
or the 7 were a 6
anonymous
  • anonymous
yes u can factor the denominator to (5p+4)(p-4) on the first equation but the numerator u cannot
calculusxy
  • calculusxy
thanks for your help! @magepker728 @phi
anonymous
  • anonymous
np

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