anonymous
  • anonymous
(4x+1)^2=20 solve each equation by the square root property
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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hartnn
  • hartnn
did you take square root on both sides, first ? what you get ?
anonymous
  • anonymous
solve for X i mean
hartnn
  • hartnn
yeah, take square root on both sides of \((4x+1)^2=20\) what do you get ?

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anonymous
  • anonymous
not sure
anonymous
  • anonymous
4x-1=\[\sqrt{20}\] =
hartnn
  • hartnn
that would be \(4x+1 =\pm \sqrt {20}\) ok? now subtract 1 from both sides, what u get ?
anonymous
  • anonymous
4x=\[\pm \sqrt{20}\] - 1
hartnn
  • hartnn
thats correct, now just divide both sides by 4 and you get 2 values of x.
anonymous
  • anonymous
i got x = PM square root 4
hartnn
  • hartnn
? how ? \(4x=\pm \sqrt{20}-1 \implies x = \dfrac{\pm \sqrt{20}-1}{4}\)
anonymous
  • anonymous
|dw:1358934890536:dw|
anonymous
  • anonymous
so is it 19 divided by 4
hartnn
  • hartnn
no, it'll only be \( x = \dfrac{\pm \sqrt{20}-1}{4}\) or one simplification will be \( x = \dfrac{\pm 2\sqrt{5}-1}{4}\)
anonymous
  • anonymous
interesting

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