Auniversity business school is interested in the difference of gpas across majors. they collect a sample of 7 students from each of 4 different majors: accounting, finance, marketing and analytics. they found that the average gpa was 3.0 for accounting, 3.6 for finance, 3.1 for marketing and 3.5 for analytics. after conducting an anova, the university rejected the null hypothesis. can they conclude that the gpa of finance students is significantly different from accounting students?

answer:

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step-by-step explanation:

step-by-step explanation:

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.