4(2.1x+6)=1.4x(4.5x-0.24)

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Solution for 4(2.1x+6)=1.4x(4.5x-0.24) equation:


Simplifying
4(2.1x + 6) = 1.4x(4.5x + -0.24)

Reorder the terms:
4(6 + 2.1x) = 1.4x(4.5x + -0.24)
(6 * 4 + 2.1x * 4) = 1.4x(4.5x + -0.24)
(24 + 8.4x) = 1.4x(4.5x + -0.24)

Reorder the terms:
24 + 8.4x = 1.4x(-0.24 + 4.5x)
24 + 8.4x = (-0.24 * 1.4x + 4.5x * 1.4x)
24 + 8.4x = (-0.336x + 6.3x2)

Solving
24 + 8.4x = -0.336x + 6.3x2

Solving for variable 'x'.

Combine like terms: 8.4x + 0.336x = 8.736x
24 + 8.736x + -6.3x2 = -0.336x + 6.3x2 + 0.336x + -6.3x2

Reorder the terms:
24 + 8.736x + -6.3x2 = -0.336x + 0.336x + 6.3x2 + -6.3x2

Combine like terms: -0.336x + 0.336x = 0.000
24 + 8.736x + -6.3x2 = 0.000 + 6.3x2 + -6.3x2
24 + 8.736x + -6.3x2 = 6.3x2 + -6.3x2

Combine like terms: 6.3x2 + -6.3x2 = 0.0
24 + 8.736x + -6.3x2 = 0.0

Begin completing the square.  Divide all terms by
-6.3 the coefficient of the squared term: 

Divide each side by '-6.3'.
-3.80952381 + -1.386666667x + x2 = 0

Move the constant term to the right:

Add '3.80952381' to each side of the equation.
-3.80952381 + -1.386666667x + 3.80952381 + x2 = 0 + 3.80952381

Reorder the terms:
-3.80952381 + 3.80952381 + -1.386666667x + x2 = 0 + 3.80952381

Combine like terms: -3.80952381 + 3.80952381 = 0.00000000
0.00000000 + -1.386666667x + x2 = 0 + 3.80952381
-1.386666667x + x2 = 0 + 3.80952381

Combine like terms: 0 + 3.80952381 = 3.80952381
-1.386666667x + x2 = 3.80952381

The x term is -1.386666667x.  Take half its coefficient (-0.6933333335).
Square it (0.4807111113) and add it to both sides.

Add '0.4807111113' to each side of the equation.
-1.386666667x + 0.4807111113 + x2 = 3.80952381 + 0.4807111113

Reorder the terms:
0.4807111113 + -1.386666667x + x2 = 3.80952381 + 0.4807111113

Combine like terms: 3.80952381 + 0.4807111113 = 4.2902349213
0.4807111113 + -1.386666667x + x2 = 4.2902349213

Factor a perfect square on the left side:
(x + -0.6933333335)(x + -0.6933333335) = 4.2902349213

Calculate the square root of the right side: 2.071288227

Break this problem into two subproblems by setting 
(x + -0.6933333335) equal to 2.071288227 and -2.071288227.

Subproblem 1

x + -0.6933333335 = 2.071288227 Simplifying x + -0.6933333335 = 2.071288227 Reorder the terms: -0.6933333335 + x = 2.071288227 Solving -0.6933333335 + x = 2.071288227 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.6933333335' to each side of the equation. -0.6933333335 + 0.6933333335 + x = 2.071288227 + 0.6933333335 Combine like terms: -0.6933333335 + 0.6933333335 = 0.0000000000 0.0000000000 + x = 2.071288227 + 0.6933333335 x = 2.071288227 + 0.6933333335 Combine like terms: 2.071288227 + 0.6933333335 = 2.7646215605 x = 2.7646215605 Simplifying x = 2.7646215605

Subproblem 2

x + -0.6933333335 = -2.071288227 Simplifying x + -0.6933333335 = -2.071288227 Reorder the terms: -0.6933333335 + x = -2.071288227 Solving -0.6933333335 + x = -2.071288227 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.6933333335' to each side of the equation. -0.6933333335 + 0.6933333335 + x = -2.071288227 + 0.6933333335 Combine like terms: -0.6933333335 + 0.6933333335 = 0.0000000000 0.0000000000 + x = -2.071288227 + 0.6933333335 x = -2.071288227 + 0.6933333335 Combine like terms: -2.071288227 + 0.6933333335 = -1.3779548935 x = -1.3779548935 Simplifying x = -1.3779548935

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.7646215605, -1.3779548935}

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