Evaluate the following expressions when x=-4 and y=4

1025/4

Step-by-step explanation:

x^6 - x

4y

Let x =-4 and y = 4

(-4)^6 - (-4)

4*4

4096 +4

16

4100/16

1025/4

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.

answer: y = -2.5x - 15

              (-6,0)

step-by-step explanation: