document.write( "Question 107515: solve by vertex form :
\n" ); document.write( "y = x^2+6x-12
\n" ); document.write( "y = 4x^2-24x-11 \n" ); document.write( "

Algebra.Com's Answer #78290 by stanbon(75887) $\"\"$ $\"About$

You can put this solution on YOUR website!
solve by vertex form :
\n" ); document.write( "You do not \"solve\" by vertex form. You may \"put the equation\"
\n" ); document.write( "into vertex form. But that is not \"solving\" it.
\n" ); document.write( "--------------------
\n" ); document.write( "y = x^2+6x-12
\n" ); document.write( "x^2+6x+? = y+12+?
\n" ); document.write( "x^2+6x+9 = y+12+9
\n" ); document.write( "(x+3)^2 = y+21
\n" ); document.write( "Vertex: (-3,-21)
\n" ); document.write( " $\"graph%28400%2C300%2C-10%2C10%2C-30%2C10%2Cx%5E2%2B6x-12%29\"$
\n" ); document.write( "======================\r
\n" ); document.write( "\n" ); document.write( "y = 4x^2-24x-11
\n" ); document.write( "4x^2-24x = y+11
\n" ); document.write( "4(x^2-6x+?) = y+11+4?
\n" ); document.write( "4(x^2-6x+9) = y+11+36
\n" ); document.write( "4(x-3)^2 = y+47
\n" ); document.write( "(x-3)^2 = (1/4)(y+47)
\n" ); document.write( "Vertex: (3,-47)
\n" ); document.write( " $\"graph%28400%2C300%2C-10%2C10%2C-50%2C10%2C4x%5E2-24x-11%29\"$
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "

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