4x^2-6x-56=3x-16

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Solution for 4x^2-6x-56=3x-16 equation:


Simplifying
4x2 + -6x + -56 = 3x + -16

Reorder the terms:
-56 + -6x + 4x2 = 3x + -16

Reorder the terms:
-56 + -6x + 4x2 = -16 + 3x

Solving
-56 + -6x + 4x2 = -16 + 3x

Solving for variable 'x'.

Reorder the terms:
-56 + 16 + -6x + -3x + 4x2 = -16 + 3x + 16 + -3x

Combine like terms: -56 + 16 = -40
-40 + -6x + -3x + 4x2 = -16 + 3x + 16 + -3x

Combine like terms: -6x + -3x = -9x
-40 + -9x + 4x2 = -16 + 3x + 16 + -3x

Reorder the terms:
-40 + -9x + 4x2 = -16 + 16 + 3x + -3x

Combine like terms: -16 + 16 = 0
-40 + -9x + 4x2 = 0 + 3x + -3x
-40 + -9x + 4x2 = 3x + -3x

Combine like terms: 3x + -3x = 0
-40 + -9x + 4x2 = 0

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

Divide each side by '4'.
-10 + -2.25x + x2 = 0

Move the constant term to the right:

Add '10' to each side of the equation.
-10 + -2.25x + 10 + x2 = 0 + 10

Reorder the terms:
-10 + 10 + -2.25x + x2 = 0 + 10

Combine like terms: -10 + 10 = 0
0 + -2.25x + x2 = 0 + 10
-2.25x + x2 = 0 + 10

Combine like terms: 0 + 10 = 10
-2.25x + x2 = 10

The x term is -2.25x.  Take half its coefficient (-1.125).
Square it (1.265625) and add it to both sides.

Add '1.265625' to each side of the equation.
-2.25x + 1.265625 + x2 = 10 + 1.265625

Reorder the terms:
1.265625 + -2.25x + x2 = 10 + 1.265625

Combine like terms: 10 + 1.265625 = 11.265625
1.265625 + -2.25x + x2 = 11.265625

Factor a perfect square on the left side:
(x + -1.125)(x + -1.125) = 11.265625

Calculate the square root of the right side: 3.356430396

Break this problem into two subproblems by setting 
(x + -1.125) equal to 3.356430396 and -3.356430396.

Subproblem 1

x + -1.125 = 3.356430396 Simplifying x + -1.125 = 3.356430396 Reorder the terms: -1.125 + x = 3.356430396 Solving -1.125 + x = 3.356430396 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.125' to each side of the equation. -1.125 + 1.125 + x = 3.356430396 + 1.125 Combine like terms: -1.125 + 1.125 = 0.000 0.000 + x = 3.356430396 + 1.125 x = 3.356430396 + 1.125 Combine like terms: 3.356430396 + 1.125 = 4.481430396 x = 4.481430396 Simplifying x = 4.481430396

Subproblem 2

x + -1.125 = -3.356430396 Simplifying x + -1.125 = -3.356430396 Reorder the terms: -1.125 + x = -3.356430396 Solving -1.125 + x = -3.356430396 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.125' to each side of the equation. -1.125 + 1.125 + x = -3.356430396 + 1.125 Combine like terms: -1.125 + 1.125 = 0.000 0.000 + x = -3.356430396 + 1.125 x = -3.356430396 + 1.125 Combine like terms: -3.356430396 + 1.125 = -2.231430396 x = -2.231430396 Simplifying x = -2.231430396

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.481430396, -2.231430396}

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