document.write( "Question 509557: 1 1
\n" ); document.write( "--- + --- = 1 Solve by using quadratic formula
\n" ); document.write( "y-5 y+5 \n" ); document.write( "

Algebra.Com's Answer #341493 by stanbon(75887) $\"\"$ $\"About$

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1 1
\n" ); document.write( "--- + --- = 1 Solve by using quadratic formula
\n" ); document.write( "y-5 y+5\r
\n" ); document.write( "\n" ); document.write( "-----------------------
\n" ); document.write( "Multiply thru by (y-5)(y+5) to get:
\n" ); document.write( "y+5 + y-5 = (y-5)(y+5)
\n" ); document.write( "2y = y^2-25
\n" ); document.write( "---
\n" ); document.write( "Rearrange:
\n" ); document.write( "y^2 -2y -25 = 0
\n" ); document.write( "---
\n" ); document.write( "Quadratic Formula:
\n" ); document.write( "y = [2 +- sqrt(2^2-4*-25)]/2
\n" ); document.write( "-----
\n" ); document.write( "y = [2 +- sqrt(104)]/2
\n" ); document.write( "---
\n" ); document.write( "y = [2 +- 2sqrt(21)]/2
\n" ); document.write( "---
\n" ); document.write( "y = 1+sqrt(21) or y = 1-sqrt(21)\r
\n" ); document.write( "\n" ); document.write( "====================================
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( "============== \n" ); document.write( "

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