0=x^3+8x^2+7x

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Solution for 0=x^3+8x^2+7x equation: 


Simplifying
0 = x3 + 8x2 + 7x

Reorder the terms:
0 = 7x + 8x2 + x3

Solving
0 = 7x + 8x2 + x3

Solving for variable 'x'.
Remove the zero:
-7x + -8x2 + -1x3 = 7x + 8x2 + x3 + -7x + -8x2 + -1x3

Reorder the terms:
-7x + -8x2 + -1x3 = 7x + -7x + 8x2 + -8x2 + x3 + -1x3

Combine like terms: 7x + -7x = 0
-7x + -8x2 + -1x3 = 0 + 8x2 + -8x2 + x3 + -1x3
-7x + -8x2 + -1x3 = 8x2 + -8x2 + x3 + -1x3

Combine like terms: 8x2 + -8x2 = 0
-7x + -8x2 + -1x3 = 0 + x3 + -1x3
-7x + -8x2 + -1x3 = x3 + -1x3

Combine like terms: x3 + -1x3 = 0
-7x + -8x2 + -1x3 = 0

Factor out the Greatest Common Factor (GCF), '-1x'.
-1x(7 + 8x + x2) = 0

Factor a trinomial.
-1x((7 + x)(1 + x)) = 0

Ignore the factor -1.

Subproblem 1
Set the factor 'x' equal to zero and attempt to solve:

Simplifying
x = 0

Solving
x = 0

Move all terms containing x to the left, all other terms to the right.

Simplifying
x = 0

Subproblem 2
Set the factor '(7 + x)' equal to zero and attempt to solve:

Simplifying
7 + x = 0

Solving
7 + x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-7' to each side of the equation.
7 + -7 + x = 0 + -7

Combine like terms: 7 + -7 = 0
0 + x = 0 + -7
x = 0 + -7

Combine like terms: 0 + -7 = -7
x = -7

Simplifying
x = -7

Subproblem 3
Set the factor '(1 + x)' equal to zero and attempt to solve:

Simplifying
1 + x = 0

Solving
1 + x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-1' to each side of the equation.
1 + -1 + x = 0 + -1

Combine like terms: 1 + -1 = 0
0 + x = 0 + -1
x = 0 + -1

Combine like terms: 0 + -1 = -1
x = -1

Simplifying
x = -1
Solution
x = {0, -7, -1}

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