document.write( "Question 1085857: find the x-intercepts of the parabola with vertex (-3,16) and y-intercept (0,-20). Write your answer in this form: (x1,y1),(x2,y2). If necessary, round to the nearest hundredth \n" ); document.write( "

Algebra.Com's Answer #699983 by MathTherapy(10552) $\"\"$ $\"About$

You can put this solution on YOUR website!

\n" ); document.write( "find the x-intercepts of the parabola with vertex (-3,16) and y-intercept (0,-20). Write your answer in this form: (x1,y1),(x2,y2). If necessary, round to the nearest hundredth
\n" ); document.write( "

 <===== Vertex form of a parabolic equation\r\n" );
document.write( " ------- Substituting (0, - 20) for (x, y) and (- 3, 16) for (h, k)\r\n" );
document.write( "- 20 = 9a + 16\r\n" );
document.write( "- 20 - 16 = 9a\r\n" );
document.write( "- 36 = 9a\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( " <===== Vertex form of a parabolic equation\r\n" );
document.write( " ------- Substituting 0 for y,  - 4 for a, and (- 3, 16) for (h, k)\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "(x + 5)(x + 1) = 0\r\n" );
document.write( "x = - 5		OR    		 x = - 1\r\n" );
document.write( "

\n" ); document.write( "

\n" );