Arseniy O.
asked • 05/06/17Solve the Equation
_____
√(y+2)2=c
solve for y
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1 Expert Answer
Katie B. answered • 05/06/17
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So, the square root of a square is the original number, meaning the left side is simply "y + 2"
y + 2 = c => y = c - 2
Arseniy O.
it is not c-2, i already tried it.
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05/07/17
Sylvan O.
What makes you think the answer is not c-2?
Try it again, plugging in "c-2" for y.
The first step is to recognize what Katie said - that the square root of a square is the original number.
So if you cancel out the ^2 and the radical (the square root sign) on the left side (not touching the right side), what are you left with after you plug in "c-2" for y?
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05/07/17
Arseniy O.
the website that checks my hw says that it is wrong. y can be negative, but no matter how big y is, c will never be negative.
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05/07/17
Katie B.
Thanks Sylvan! The only possible change I can think of is ± (y + 2) = c (accounting for c being the square of a negative number).
This means two answers are possible:
My original answer of y = c - 2 and
-y - 2 = c => y = -c - 2
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05/07/17
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