document.write( "Question 689120: Find the vertex axis of symmetry (XS) max or min function value X-intercepts Y intercept and graph the function: F(x)= -x^2 - 2x + 7 \n" ); document.write( "
Algebra.Com's Answer #425838 by stanbon(75887)\"\" \"About 
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Find the vertex axis of symmetry (XS) max or min function value X-intercepts Y intercept and graph the function: F(x)= -x^2 - 2x + 7
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\n" ); document.write( "The vertex occurs at x = -b/(2a) = 2/(2*-1) = -1
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\n" ); document.write( "F(-1) = -1+2+7 = 8
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\n" ); document.write( "Vertex at (-1,8)
\n" ); document.write( "Max at (-1,8)
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\n" ); document.write( "Axis of symmetry: x = -1
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\n" ); document.write( "y-intercept: f(0) = 7
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\n" ); document.write( "x-intercept = ?
\n" ); document.write( "Solve -x^2-2x+7 = 0
\n" ); document.write( "x = [2+- sqrt(4-4*-1*7)]/(-2)
\n" ); document.write( "x = [2+- sqrt(32)]/(-2)
\n" ); document.write( "x = [2 +- 4sqrt(2)]/(-2)
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\n" ); document.write( "x-intercepts: x = -1+2sqrt(2) or x = -1-2sqrt(2)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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