Question 242361
{{{y=-3x^2-6x-5 }}}
Do the positive and negative values of x side by side. 
Only the sign of the x term changes. 
{{{x=0}}}, {{{y=-5}}}
{{{x=1}}}, {{{y=-3-6-5=-14}}}
{{{x=-1}}}, {{{y=-3+6-5=-2}}}
{{{x=2}}}, {{{y=-12-12-5=-29}}}
{{{x=-2}}}, {{{y=-12+12-5=-5}}}
{{{x=3}}}, {{{y=-27-18-5=-50}}}
{{{x=-3}}}, {{{y=-27+18-5=-14}}}
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{{{ graph( 300, 300, -5, 5, -50, 50, -3x^2-6x-5) }}}