What is the solution to the system of equations? -2x+y= -5
3x - 2y=12
a. (3,1)
b. (6,3)
c. (-2,-9)
d. (-2,-1)

step-by-step explanation:

answers available in this download

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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.