What is the equation of the parabola?
y= -1/12x^2-2
y=1/12x^2-2
y=-1/12x^2+2
y=1/12x^2+

Step-by-step explanation:

Answer is 1/12x^2 +2

Since the parabola smiles, the coefficient 1/12 should be positive and the constant 2 is positive. The fact that the parabola cuts at positive 2 explains this.

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

a. is correct