The closest star to our sun, proxima centauri, is 39,900,000,000,000,000
meters away from earth.
a. write this distance in scientific notation. 3.90 * 10
b. light travels at a speed of 3.0 * 108 meters per second. how can you
calculate the time in seconds that it takes light from proxima centauri
to reach earth? how many seconds does it take? write your answer in
scientific notation and standard notation.

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.

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.