8x=(x^3)+(3x^2)

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Solution for 8x=(x^3)+(3x^2) equation:


Simplifying
8x = (x3) + (3x2)
8x = x3 + (3x2)

Reorder the terms:
8x = (3x2) + x3

Solving
8x = (3x2) + x3

Solving for variable 'x'.

Reorder the terms:
8x + (-3x2) + -1x3 = (3x2) + (-3x2) + x3 + -1x3

Combine like terms: (3x2) + (-3x2) = 0
8x + (-3x2) + -1x3 = 0 + x3 + -1x3
8x + (-3x2) + -1x3 = x3 + -1x3

Combine like terms: x3 + -1x3 = 0
8x + (-3x2) + -1x3 = 0

Factor out the Greatest Common Factor (GCF), 'x'.
x(8 + (-3x) + -1x2) = 0

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 '(8 + (-3x) + -1x2)' equal to zero and attempt to solve: Simplifying 8 + (-3x) + -1x2 = 0 Solving 8 + (-3x) + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. -8 + (3x) + x2 = 0 Move the constant term to the right: Add '8' to each side of the equation. -8 + (3x) + 8 + x2 = 0 + 8 Reorder the terms: -8 + 8 + (3x) + x2 = 0 + 8 Combine like terms: -8 + 8 = 0 0 + (3x) + x2 = 0 + 8 (3x) + x2 = 0 + 8 Combine like terms: 0 + 8 = 8 (3x) + x2 = 8 The x term is (3x). Take half its coefficient (1.5). Square it (2.25) and add it to both sides. Add '2.25' to each side of the equation. (3x) + 2.25 + x2 = 8 + 2.25 Reorder the terms: 2.25 + (3x) + x2 = 8 + 2.25 Combine like terms: 8 + 2.25 = 10.25 2.25 + (3x) + x2 = 10.25 Factor a perfect square on the left side: (x + 1.5)(x + 1.5) = 10.25 Calculate the square root of the right side: 3.201562119 Break this problem into two subproblems by setting (x + 1.5) equal to 3.201562119 and -3.201562119.

Subproblem 1

x + 1.5 = 3.201562119 Simplifying x + 1.5 = 3.201562119 Reorder the terms: 1.5 + x = 3.201562119 Solving 1.5 + x = 3.201562119 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = 3.201562119 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 3.201562119 + -1.5 x = 3.201562119 + -1.5 Combine like terms: 3.201562119 + -1.5 = 1.701562119 x = 1.701562119 Simplifying x = 1.701562119

Subproblem 2

x + 1.5 = -3.201562119 Simplifying x + 1.5 = -3.201562119 Reorder the terms: 1.5 + x = -3.201562119 Solving 1.5 + x = -3.201562119 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = -3.201562119 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -3.201562119 + -1.5 x = -3.201562119 + -1.5 Combine like terms: -3.201562119 + -1.5 = -4.701562119 x = -4.701562119 Simplifying x = -4.701562119

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.701562119, -4.701562119}

Solution

x = {0, 1.701562119, -4.701562119}

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