5x-[3(x-4)][7x-4(x+3)]=0

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Solution for 5x-[3(x-4)][7x-4(x+3)]=0 equation:


Simplifying
5x + -1[3(x + -4)][7x + -4(x + 3)] = 0

Reorder the terms:
5x + -1[3(-4 + x)][7x + -4(x + 3)] = 0
5x + -1[(-4 * 3 + x * 3)][7x + -4(x + 3)] = 0
5x + -1[(-12 + 3x)][7x + -4(x + 3)] = 0

Reorder the terms:
5x + -1[-12 + 3x][7x + -4(3 + x)] = 0
5x + -1[-12 + 3x][7x + (3 * -4 + x * -4)] = 0
5x + -1[-12 + 3x][7x + (-12 + -4x)] = 0

Reorder the terms:
5x + -1[-12 + 3x][-12 + 7x + -4x] = 0

Combine like terms: 7x + -4x = 3x
5x + -1[-12 + 3x][-12 + 3x] = 0

Multiply [-12 + 3x] * [-12 + 3x]
5x + -1[-12[-12 + 3x] + 3x * [-12 + 3x]] = 0
5x + -1[[-12 * -12 + 3x * -12] + 3x * [-12 + 3x]] = 0
5x + -1[[144 + -36x] + 3x * [-12 + 3x]] = 0
5x + -1[144 + -36x + [-12 * 3x + 3x * 3x]] = 0
5x + -1[144 + -36x + [-36x + 9x2]] = 0

Combine like terms: -36x + -36x = -72x
5x + -1[144 + -72x + 9x2] = 0
5x + [144 * -1 + -72x * -1 + 9x2 * -1] = 0
5x + [-144 + 72x + -9x2] = 0

Reorder the terms:
-144 + 5x + 72x + -9x2 = 0

Combine like terms: 5x + 72x = 77x
-144 + 77x + -9x2 = 0

Solving
-144 + 77x + -9x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-9 the coefficient of the squared term: 

Divide each side by '-9'.
16 + -8.555555556x + x2 = 0

Move the constant term to the right:

Add '-16' to each side of the equation.
16 + -8.555555556x + -16 + x2 = 0 + -16

Reorder the terms:
16 + -16 + -8.555555556x + x2 = 0 + -16

Combine like terms: 16 + -16 = 0
0 + -8.555555556x + x2 = 0 + -16
-8.555555556x + x2 = 0 + -16

Combine like terms: 0 + -16 = -16
-8.555555556x + x2 = -16

The x term is -8.555555556x.  Take half its coefficient (-4.277777778).
Square it (18.29938272) and add it to both sides.

Add '18.29938272' to each side of the equation.
-8.555555556x + 18.29938272 + x2 = -16 + 18.29938272

Reorder the terms:
18.29938272 + -8.555555556x + x2 = -16 + 18.29938272

Combine like terms: -16 + 18.29938272 = 2.29938272
18.29938272 + -8.555555556x + x2 = 2.29938272

Factor a perfect square on the left side:
(x + -4.277777778)(x + -4.277777778) = 2.29938272

Calculate the square root of the right side: 1.516371564

Break this problem into two subproblems by setting 
(x + -4.277777778) equal to 1.516371564 and -1.516371564.

Subproblem 1

x + -4.277777778 = 1.516371564 Simplifying x + -4.277777778 = 1.516371564 Reorder the terms: -4.277777778 + x = 1.516371564 Solving -4.277777778 + x = 1.516371564 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.277777778' to each side of the equation. -4.277777778 + 4.277777778 + x = 1.516371564 + 4.277777778 Combine like terms: -4.277777778 + 4.277777778 = 0.000000000 0.000000000 + x = 1.516371564 + 4.277777778 x = 1.516371564 + 4.277777778 Combine like terms: 1.516371564 + 4.277777778 = 5.794149342 x = 5.794149342 Simplifying x = 5.794149342

Subproblem 2

x + -4.277777778 = -1.516371564 Simplifying x + -4.277777778 = -1.516371564 Reorder the terms: -4.277777778 + x = -1.516371564 Solving -4.277777778 + x = -1.516371564 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.277777778' to each side of the equation. -4.277777778 + 4.277777778 + x = -1.516371564 + 4.277777778 Combine like terms: -4.277777778 + 4.277777778 = 0.000000000 0.000000000 + x = -1.516371564 + 4.277777778 x = -1.516371564 + 4.277777778 Combine like terms: -1.516371564 + 4.277777778 = 2.761406214 x = 2.761406214 Simplifying x = 2.761406214

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.794149342, 2.761406214}

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