document.write( "Question 47724: sqrt of 2y + 7 + 4 = y
\n" ); document.write( " $\"sqrt%282y+%2B+7%29+%2B+4+=+y+\"$
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Algebra.Com's Answer #31602 by pizza(14) $\"\"$ $\"About$

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$\"sqrt%282y+%2B+7%29+%2B+4+=+y+\"$
\n" ); document.write( "First, hopefully, I understooed the question correctly.
\n" ); document.write( "Assuming you already know some algebraic manipulation, what you have to do here is to put the square root to one side. That is,
\n" ); document.write( " $\"sqrt%282y%2B7%29+=+y+-+4\"$
\n" ); document.write( "Then you can square both sides to get
\n" ); document.write( " $\"2y+%2B+7+=+y%5E2+-+8y+%2B16+\"$
\n" ); document.write( "which simplifies to become
\n" ); document.write( " $\"y%5E2+-+10y+%2B+9+=+0+\"$
\n" ); document.write( "which factorises to become
\n" ); document.write( " $\"+%28y-9%29%28y-1%29+=+0+\"$
\n" ); document.write( "which means y = 1 or 9.\r
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