Which shows the correct substitution of the values, a, b,andc from the equation -2=-x+x2-4 into the quadratic formula

x2=x2

-x=-x

-2=-2

Formula: x2-x-2=0

Step-by-step explanation:

quadratic formula: Ax2+Bx+C

where:

A=1

B=-1

C=-2

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.

linear pair postulates