SOLUTION: Solve for y, where y is a real number. {{{ sqrt (y + 20 = y) }}} If there is more than one solution, separate them with commas

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Question 392420: Solve for y, where y is a real number.

If there is more than one solution, separate them with commas

Found 2 solutions by nerdybill, robertb:
Answer by nerdybill(7384)   (Show Source): You can put this solution on YOUR website!
I think you mean:

square both sides to give you:




y = {-4, 5}

Answer by robertb(5830)   (Show Source): You can put this solution on YOUR website!

Square both sides:
,
==>
==> (y-5)(y+4) = 0 ==> y = 5, -4.
Y = 5 satisfies the original equation, while y = -4 does not.
Therefore the final answer is only y = 5.

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