anonymous
  • anonymous
how do you factor 27x^3 - 48x when they have no common numbers?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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OakTree
  • OakTree
Yes they do...they both share 3x.
anonymous
  • anonymous
so 3x would go on the outside of the parenthesis? like this: 3x(x )(x ) right?
OakTree
  • OakTree
Sort of... it would be 3x(9x^2-16).

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OakTree
  • OakTree
Then use difference of two squares to factor the 9x^2-16 into (3x+4)(3x-4)
OakTree
  • OakTree
So your final answer is 3x(3x+4)(3x-4)
anonymous
  • anonymous
thank u so much!
OakTree
  • OakTree
You're welcome. But do you know the difference of two squares?
anonymous
  • anonymous
isn't when u draw a box and factor that way?
OakTree
  • OakTree
NO! What you do is square root the first and last terms (only works when you can do this evenly and when the terms are being subtracted)
OakTree
  • OakTree
Your two factors are those two square roots, except one is plus and one is minus.
anonymous
  • anonymous
oohhh yeaaa i remember that...i didn't know it was called difference of 2 squares
OakTree
  • OakTree
Like (x+4)(x-4)
OakTree
  • OakTree
Oh. That's because it's a difference (subtraction) of two square numbers.
anonymous
  • anonymous
ohh ok ... thanks for explainin that

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