3x(x+1)(7x-2)=0

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Solution for 3x(x+1)(7x-2)=0 equation: 


Simplifying
3x(x + 1)(7x + -2) = 0

Reorder the terms:
3x(1 + x)(7x + -2) = 0

Reorder the terms:
3x(1 + x)(-2 + 7x) = 0

Multiply (1 + x) * (-2 + 7x)
3x(1(-2 + 7x) + x(-2 + 7x)) = 0
3x((-2 * 1 + 7x * 1) + x(-2 + 7x)) = 0
3x((-2 + 7x) + x(-2 + 7x)) = 0
3x(-2 + 7x + (-2 * x + 7x * x)) = 0
3x(-2 + 7x + (-2x + 7x2)) = 0

Combine like terms: 7x + -2x = 5x
3x(-2 + 5x + 7x2) = 0
(-2 * 3x + 5x * 3x + 7x2 * 3x) = 0
(-6x + 15x2 + 21x3) = 0

Solving
-6x + 15x2 + 21x3 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '3x'.
3x(-2 + 5x + 7x2) = 0

Factor a trinomial.
3x((-1 + -1x)(2 + -7x)) = 0

Ignore the factor 3.

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 '(-1 + -1x)' equal to zero and attempt to solve:

Simplifying
-1 + -1x = 0

Solving
-1 + -1x = 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 + -1x = 0 + 1

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

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

Divide each side by '-1'.
x = -1

Simplifying
x = -1

Subproblem 3
Set the factor '(2 + -7x)' equal to zero and attempt to solve:

Simplifying
2 + -7x = 0

Solving
2 + -7x = 0

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

Add '-2' to each side of the equation.
2 + -2 + -7x = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -7x = 0 + -2
-7x = 0 + -2

Combine like terms: 0 + -2 = -2
-7x = -2

Divide each side by '-7'.
x = 0.2857142857

Simplifying
x = 0.2857142857
Solution
x = {0, -1, 0.2857142857}

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