razor99
  • razor99
Factorize
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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razor99
  • razor99
81a^2-100
swissgirl
  • swissgirl
(9a+10)(9a-10) Its difference of squares
razor99
  • razor99
yep

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razor99
  • razor99
swissgirl
razor99
  • razor99
@swissgirl
swissgirl
  • swissgirl
so you got it?
razor99
  • razor99
could u tell me the steps
razor99
  • razor99
i mean could u show it
swissgirl
  • swissgirl
I realized that we were missing the middle term Usually the equation is in the form \(ax^2+bx+c\) In this case the equation was in this form \(ax^2+c\) it was missing the bx So that means its difference of squares meaning that middle term canceled out
razor99
  • razor99
oh i get it thanx pippa u are a life saver
swissgirl
  • swissgirl
I am back should i finish off explaining or did u get it?
razor99
  • razor99
could u finish it
swissgirl
  • swissgirl
So anyways it is in the form \(a^2-b^2=(a-b)(a+b)\) \(81x^2-100=(9x-10)(9x+10)\) In this case our a=9x and b=10 So \(a^2=(9x)^2=81x^2 \text{ and } b^2=(10)^2=100\)

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