Question 987008
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a) Is y = x^2 + 7x + 12 a quadratic equation*? Why or why not?
Yes it is. A quadratic equation is an equation of degree 2 
(the variable to highest power is raised ^2).
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b) {{{x^2+7x+12=0}}}
{{{(x+3)(x+4)=0}}}
{{{x+3=0}}} {{{OR}}} {{{x+4=0}}}
{{{x=-3}}} {{{OR}}} {{{x=-4}}}
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d) {{{y=x^2+3x-23}}}
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*[invoke quadratic "x", 1, 3, -23 ]