3x+y=4
x+2y=-2
what is the answer

2(3x+y=4)

1(x+2y=-2)

6x+2y=8

(-) x+2y=-2

5x=10

5

x=2

x+2y=-1

2+2y=-1

-2 -2

2y=-3

2

y=-3/2

Step-by-step explanation:

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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.