Which expression that is equivalent to 6(a − 2) + 8a ⋅2+3(a + 1)
A, 17a−7
B, 17a−9
C, 25a+15
D, 25a−9

D) 25a-9

Step-by-step explanation:

6(a-2)+8a*2+3(a+1)

6a-12+16a+3a+3

6a+16a+3a-12+3

22a+3a-12+3

25a-12+3

25a-9

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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.