3x + 2(x + 5) = -2(x - 9) - 15
please give the answer and step-by-step

x = -1

Step-by-step explanation:

Expand 2(x +5 ): 2x +10

Expand -2(x - 9) - 15: -2x + 3

Subtract 10 from both sides

Simplify it

Add 2x to both sides

Simplify it

Divide both sides by 7

Simplify it again...it will be x = -1

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.

step-by-step explanation:

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