anonymous
  • anonymous
how do you do y^2 - 28 = 0 using the square root property of equality
Mathematics
schrodinger
  • schrodinger
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Hero
  • Hero
Square Root Property of Equality: If y^2 = a, then sqrt{y^2) = sqrt{a}. On the left side, the sqrt and square are inverses of each other so they cancel. On the right side, sqrt{a} = + or - sqrt{a} For example, if y^2 = 4, then sqrt{y^2} = sqrt{4}, which becomes y = + or - 2
anonymous
  • anonymous
where does the "a" come from?
Hero
  • Hero
It's a general case

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Hero
  • Hero
a means any number

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