Consider the plot that was created from the residuals of a line of best fit for a set of data.
a graph with both axes numbered 1 to 10. points show an upward trend.
does the residual plot show that the line of best fit is appropriate for the data?
yes, the points are rising.
yes, the points are all above the x-axis.
no, it follows a pattern.
no, the points are falling.

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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.