calculusxy
  • calculusxy
Help in subtracting rational expressions!
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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calculusxy
  • calculusxy
\[\large \frac{ p + 4 }{ 3p^2 + 5p - 28 } - \frac{ 6p }{ 3p }\]
welshfella
  • welshfella
first find the LCD of the 2 denominators
calculusxy
  • calculusxy
How can we do that will factoring?

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welshfella
  • welshfella
just multiply the 2 together though you can factor the first one i think
welshfella
  • welshfella
= (3p - 7)(p + 4)
welshfella
  • welshfella
so LCD is 3p(3p - 7)(p + 4)
welshfella
  • welshfella
oh I just realised the right fraction = 2!!
calculusxy
  • calculusxy
yes
welshfella
  • welshfella
- that simplifies it a lot!!!
welshfella
  • welshfella
lol
calculusxy
  • calculusxy
Sorry i need to eat lunch. i will come back you can keep on doing whatever you want for this problem .
welshfella
  • welshfella
so we have (p + 4) - 2(p+4)(3p - 7) -------------------- (3p - 7)(p + 4)
welshfella
  • welshfella
OK so its now a matter of simplification
welshfella
  • welshfella
I'm sure you can finish this off

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