Help plz will give 25 points

39

Step-by-step explanation:

SInce the problem asks for the expression when a=2 and d=5, you olug in the values of a and d and solve.

(5)²+3(2)+6+(2)                 [exponent]

25+3(2)+6+2                     [multiply]

25+6+6+2                          [add]

39

After plugging in a=2 and d=5, we got 39 as our answer.

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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.