8x(8+6x)=20

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Solution for 8x(8+6x)=20 equation:


Simplifying
8x(8 + 6x) = 20
(8 * 8x + 6x * 8x) = 20
(64x + 48x2) = 20

Solving
64x + 48x2 = 20

Solving for variable 'x'.

Reorder the terms:
-20 + 64x + 48x2 = 20 + -20

Combine like terms: 20 + -20 = 0
-20 + 64x + 48x2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(-5 + 16x + 12x2) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(-5 + 16x + 12x2)' equal to zero and attempt to solve: Simplifying -5 + 16x + 12x2 = 0 Solving -5 + 16x + 12x2 = 0 Begin completing the square. Divide all terms by 12 the coefficient of the squared term: Divide each side by '12'. -0.4166666667 + 1.333333333x + x2 = 0 Move the constant term to the right: Add '0.4166666667' to each side of the equation. -0.4166666667 + 1.333333333x + 0.4166666667 + x2 = 0 + 0.4166666667 Reorder the terms: -0.4166666667 + 0.4166666667 + 1.333333333x + x2 = 0 + 0.4166666667 Combine like terms: -0.4166666667 + 0.4166666667 = 0.0000000000 0.0000000000 + 1.333333333x + x2 = 0 + 0.4166666667 1.333333333x + x2 = 0 + 0.4166666667 Combine like terms: 0 + 0.4166666667 = 0.4166666667 1.333333333x + x2 = 0.4166666667 The x term is 1.333333333x. Take half its coefficient (0.6666666665). Square it (0.4444444442) and add it to both sides. Add '0.4444444442' to each side of the equation. 1.333333333x + 0.4444444442 + x2 = 0.4166666667 + 0.4444444442 Reorder the terms: 0.4444444442 + 1.333333333x + x2 = 0.4166666667 + 0.4444444442 Combine like terms: 0.4166666667 + 0.4444444442 = 0.8611111109 0.4444444442 + 1.333333333x + x2 = 0.8611111109 Factor a perfect square on the left side: (x + 0.6666666665)(x + 0.6666666665) = 0.8611111109 Calculate the square root of the right side: 0.927960727 Break this problem into two subproblems by setting (x + 0.6666666665) equal to 0.927960727 and -0.927960727.

Subproblem 1

x + 0.6666666665 = 0.927960727 Simplifying x + 0.6666666665 = 0.927960727 Reorder the terms: 0.6666666665 + x = 0.927960727 Solving 0.6666666665 + x = 0.927960727 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6666666665' to each side of the equation. 0.6666666665 + -0.6666666665 + x = 0.927960727 + -0.6666666665 Combine like terms: 0.6666666665 + -0.6666666665 = 0.0000000000 0.0000000000 + x = 0.927960727 + -0.6666666665 x = 0.927960727 + -0.6666666665 Combine like terms: 0.927960727 + -0.6666666665 = 0.2612940605 x = 0.2612940605 Simplifying x = 0.2612940605

Subproblem 2

x + 0.6666666665 = -0.927960727 Simplifying x + 0.6666666665 = -0.927960727 Reorder the terms: 0.6666666665 + x = -0.927960727 Solving 0.6666666665 + x = -0.927960727 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6666666665' to each side of the equation. 0.6666666665 + -0.6666666665 + x = -0.927960727 + -0.6666666665 Combine like terms: 0.6666666665 + -0.6666666665 = 0.0000000000 0.0000000000 + x = -0.927960727 + -0.6666666665 x = -0.927960727 + -0.6666666665 Combine like terms: -0.927960727 + -0.6666666665 = -1.5946273935 x = -1.5946273935 Simplifying x = -1.5946273935

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.2612940605, -1.5946273935}

Solution

x = {0.2612940605, -1.5946273935}

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