anonymous
  • anonymous
Solve sqrt(x^2 + 4) = 4x
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
square both sides
anonymous
  • anonymous
\[x^{2}+4=16x ^{2}\]
anonymous
  • anonymous
can you solve this?

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RedPrince
  • RedPrince
\[\sqrt(x^2+4)=4x\] taking square on both sides \[x^2-4=16x^2\] \[16x^2-x^2=4\] \[15x^2=4\] \[x^2=4/15\] \[x=\pm2/\sqrt(15)\]
pfenn1
  • pfenn1
@RedPrince, how did you go from\[x ^{2}+4=16x ^{2}\]to\[x ^{2}-4=16x ^{2}\]?
RedPrince
  • RedPrince
@pfenn1 by mistake correct it it is now 17 instead of 15 thanks for this

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