document.write( "Question 341469: Where does the parabola with the vertex (-4,5)and y-intercept -27 cross the x-axis? \n" ); document.write( "

Algebra.Com's Answer #244516 by Fombitz(32388) $\"\"$ $\"About$

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In vertex form,
\n" ); document.write( " $\"y=a%28x-h%29%5E2%2Bk\"$
\n" ); document.write( " $\"y=a%28x-%28-4%29%29%5E2%2B5\"$
\n" ); document.write( " $\"y=a%28x%2B4%29%5E2%2B5\"$
\n" ); document.write( "When $\"x=0\"$
\n" ); document.write( " $\"16a%2B5=-27\"$
\n" ); document.write( " $\"16a=-32\"$
\n" ); document.write( " $\"a=-2\"$
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\n" ); document.write( " $\"y=-2%28x%2B4%29%5E2%2B5=0\"$
\n" ); document.write( " $\"2%28x%2B4%29%5E2=5\"$
\n" ); document.write( " $\"%28x%2B4%29%5E2=5%2F2\"$
\n" ); document.write( " $\"x%2B4=0+%2B-+sqrt%285%2F2%29\"$
\n" ); document.write( " $\"highlight%28x=-4+%2B-+sqrt%2810%29%2F2%29\"$
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