A video which has a cash price of $3000 may be bought on hire purchase . To obtain the video on hire purchase, a deposit of 10% of the cash price is made and 30 monthly installments of $150.50 each are required. Calculate(a hire purchase price of video and (b) the difference between the cash price and the hire purchase price as a percentage of the cash )

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.

60%