Bananas1234
  • Bananas1234
Solve (8x + 3)^2 = 16
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
first lets break this up so we can use the FOIL method. Do you know how to do that?
Bananas1234
  • Bananas1234
Kinda, but not very well
anonymous
  • anonymous
well lets break up the left side first. show me what another way to represent that squared.

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Bananas1234
  • Bananas1234
8x^3?
anonymous
  • anonymous
Not quite. we can rewrite this as (8x+3)(8x+3) = 16
anonymous
  • anonymous
OR!!
anonymous
  • anonymous
If we take the square root of both sides then we get (8x+3)= 4 That equation is much more simple to solve.
anonymous
  • anonymous
remember the square root undoes a square and vise versa.
anonymous
  • anonymous
Does that all make sense? If so, great! If not, let me know where you're stuck. If you do understand, post your answer and i will check your work!
Bananas1234
  • Bananas1234
-7/8, 1/8?
Bananas1234
  • Bananas1234
@agentc0re
anonymous
  • anonymous
Yup, that's correct! http://www.wolframalpha.com/input/?i=%288x%2B3%29%5E2%3D+16
anonymous
  • anonymous
Good job!

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