anonymous
  • anonymous
sqrt of a+21 -1 = sqrt of a + 12
Precalculus
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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RadEn
  • RadEn
first, square both sides : |dw:1370235898953:dw|
anonymous
  • anonymous
So I would square both sides again lol
RadEn
  • RadEn
yes, again, square both sides will giving us : 5^2 = ( sqrt(a+21) )^2 25 = a + 21 25 - 21 = a 4 = a so, the solution is a = 4

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anonymous
  • anonymous
Awesome! I'm gonna post another one lol
RadEn
  • RadEn
go ahead :)

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