15X^3-21x^2+40x-56=0

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Solution for 15X^3-21x^2+40x-56=0 equation: 


Simplifying
15X3 + -21x2 + 40x + -56 = 0

Reorder the terms:
-56 + 15X3 + 40x + -21x2 = 0

Solving
-56 + 15X3 + 40x + -21x2 = 0

Solving for variable 'X'.

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

Add '56' to each side of the equation.
-56 + 15X3 + 40x + 56 + -21x2 = 0 + 56

Reorder the terms:
-56 + 56 + 15X3 + 40x + -21x2 = 0 + 56

Combine like terms: -56 + 56 = 0
0 + 15X3 + 40x + -21x2 = 0 + 56
15X3 + 40x + -21x2 = 0 + 56

Combine like terms: 0 + 56 = 56
15X3 + 40x + -21x2 = 56

Add '-40x' to each side of the equation.
15X3 + 40x + -40x + -21x2 = 56 + -40x

Combine like terms: 40x + -40x = 0
15X3 + 0 + -21x2 = 56 + -40x
15X3 + -21x2 = 56 + -40x

Add '21x2' to each side of the equation.
15X3 + -21x2 + 21x2 = 56 + -40x + 21x2

Combine like terms: -21x2 + 21x2 = 0
15X3 + 0 = 56 + -40x + 21x2
15X3 = 56 + -40x + 21x2

Divide each side by '15'.
X3 = 3.733333333 + -2.666666667x + 1.4x2

Simplifying
X3 = 3.733333333 + -2.666666667x + 1.4x2

Reorder the terms:
-3.733333333 + X3 + 2.666666667x + -1.4x2 = 3.733333333 + -2.666666667x + 1.4x2 + -3.733333333 + 2.666666667x + -1.4x2

Reorder the terms:
-3.733333333 + X3 + 2.666666667x + -1.4x2 = 3.733333333 + -3.733333333 + -2.666666667x + 2.666666667x + 1.4x2 + -1.4x2

Combine like terms: 3.733333333 + -3.733333333 = 0.000000000
-3.733333333 + X3 + 2.666666667x + -1.4x2 = 0.000000000 + -2.666666667x + 2.666666667x + 1.4x2 + -1.4x2
-3.733333333 + X3 + 2.666666667x + -1.4x2 = -2.666666667x + 2.666666667x + 1.4x2 + -1.4x2

Combine like terms: -2.666666667x + 2.666666667x = 0.000000000
-3.733333333 + X3 + 2.666666667x + -1.4x2 = 0.000000000 + 1.4x2 + -1.4x2
-3.733333333 + X3 + 2.666666667x + -1.4x2 = 1.4x2 + -1.4x2

Combine like terms: 1.4x2 + -1.4x2 = 0.0
-3.733333333 + X3 + 2.666666667x + -1.4x2 = 0.0

The solution to this equation could not be determined.

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