Evaluate expression when x = 10, y = -2, and z = -5 xz divided by - y

25

Step-by-step explanation:

10(-5)/-2

times x by z and divide by y

10 times -5 makes it -50 because a positive times a negative makes it a negative

then divide -50/-2

and because 2 negatives cancel each other out it's basically just 50/2 which equals 25.

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.