Agumball machine has red, orange, yellow, green and blue gumballs. 20% of the gumballs are red, 30% are orange, 5% are yellow, 10% are green, and the rest are blue. if there are a total of 120 gumballs, how many more blue gumballs are there than yellow gumballs?

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.