A(r) is a function that gives the area of a circle with radius r. it can be written in equation form as a(r) = 3.14r2. what is the value of a(4)? a. 157.75 b. 25.12 c. 19.14 d. 50.24

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.

45

step-by-step explanation: