7x^2-112x+384=0

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Solution for 7x^2-112x+384=0 equation:


Simplifying
7x2 + -112x + 384 = 0

Reorder the terms:
384 + -112x + 7x2 = 0

Solving
384 + -112x + 7x2 = 0

Solving for variable 'x'.

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

Divide each side by '7'.
54.85714286 + -16x + x2 = 0

Move the constant term to the right:

Add '-54.85714286' to each side of the equation.
54.85714286 + -16x + -54.85714286 + x2 = 0 + -54.85714286

Reorder the terms:
54.85714286 + -54.85714286 + -16x + x2 = 0 + -54.85714286

Combine like terms: 54.85714286 + -54.85714286 = 0.00000000
0.00000000 + -16x + x2 = 0 + -54.85714286
-16x + x2 = 0 + -54.85714286

Combine like terms: 0 + -54.85714286 = -54.85714286
-16x + x2 = -54.85714286

The x term is -16x.  Take half its coefficient (-8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
-16x + 64 + x2 = -54.85714286 + 64

Reorder the terms:
64 + -16x + x2 = -54.85714286 + 64

Combine like terms: -54.85714286 + 64 = 9.14285714
64 + -16x + x2 = 9.14285714

Factor a perfect square on the left side:
(x + -8)(x + -8) = 9.14285714

Calculate the square root of the right side: 3.023715784

Break this problem into two subproblems by setting 
(x + -8) equal to 3.023715784 and -3.023715784.

Subproblem 1

x + -8 = 3.023715784 Simplifying x + -8 = 3.023715784 Reorder the terms: -8 + x = 3.023715784 Solving -8 + x = 3.023715784 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + x = 3.023715784 + 8 Combine like terms: -8 + 8 = 0 0 + x = 3.023715784 + 8 x = 3.023715784 + 8 Combine like terms: 3.023715784 + 8 = 11.023715784 x = 11.023715784 Simplifying x = 11.023715784

Subproblem 2

x + -8 = -3.023715784 Simplifying x + -8 = -3.023715784 Reorder the terms: -8 + x = -3.023715784 Solving -8 + x = -3.023715784 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + x = -3.023715784 + 8 Combine like terms: -8 + 8 = 0 0 + x = -3.023715784 + 8 x = -3.023715784 + 8 Combine like terms: -3.023715784 + 8 = 4.976284216 x = 4.976284216 Simplifying x = 4.976284216

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.023715784, 4.976284216}

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