With out using a calculator, find all the roots of the equation. x^3+x^2+4x+4=0? a. 1,+i b. 2,3+i c. +3,1 d. -1,+2i

x=-1              x = ±2i

Step-by-step explanation:

x^3+x^2+4x+4=0

Factor by grouping

x^3 + x^2      + 4x+4 =0

Factor and x^2 from the first group and 4 from the second group

x^2(x+1)   +4(x+1)

Factor out the x+1

(x+1) (x^2+4) = 0

Using the zero product property

x+1 = 0  x^2 +4= 0

x=-1   x^2 = -4

          Taking the square root of each side

           sqrt(x^2) = ±sqrt(-4)

           We know that sqrt(ab) = sqrt(a) sqr(b)

           sqrt(x^2) =±sqrt(-1) sqrt(4)

             x= ±i * 2

x=-1              x = ±2i

answer: the value should be used for i in the formula of calculation the monthly payment , the interest rate per period is 0.85.

step-by-step explanation:

the given rate of interest i= 85%

in calculating the monthly payment for a loan with an interest rate compounded monthly, the value of the interest rate per period we use in the formula must be in decimal form.

to convert it in decimal, we divide it by 100, we get

hence, the value should be used for i in the formula of calculation the monthly payment , the interest rate per period is 0.85.

step-by-step explanation:

idk the answer i want to say 10 but then it would be equal so try 9 but then yeah so yeah we love edgen