49x^2+1024-448x+8x(32-7x)-320=0

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Solution for 49x^2+1024-448x+8x(32-7x)-320=0 equation:


Simplifying
49x2 + 1024 + -448x + 8x(32 + -7x) + -320 = 0
49x2 + 1024 + -448x + (32 * 8x + -7x * 8x) + -320 = 0
49x2 + 1024 + -448x + (256x + -56x2) + -320 = 0

Reorder the terms:
1024 + -320 + -448x + 256x + 49x2 + -56x2 = 0

Combine like terms: 1024 + -320 = 704
704 + -448x + 256x + 49x2 + -56x2 = 0

Combine like terms: -448x + 256x = -192x
704 + -192x + 49x2 + -56x2 = 0

Combine like terms: 49x2 + -56x2 = -7x2
704 + -192x + -7x2 = 0

Solving
704 + -192x + -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'.
-100.5714286 + 27.42857143x + x2 = 0

Move the constant term to the right:

Add '100.5714286' to each side of the equation.
-100.5714286 + 27.42857143x + 100.5714286 + x2 = 0 + 100.5714286

Reorder the terms:
-100.5714286 + 100.5714286 + 27.42857143x + x2 = 0 + 100.5714286

Combine like terms: -100.5714286 + 100.5714286 = 0.0000000
0.0000000 + 27.42857143x + x2 = 0 + 100.5714286
27.42857143x + x2 = 0 + 100.5714286

Combine like terms: 0 + 100.5714286 = 100.5714286
27.42857143x + x2 = 100.5714286

The x term is 27.42857143x.  Take half its coefficient (13.71428572).
Square it (188.0816328) and add it to both sides.

Add '188.0816328' to each side of the equation.
27.42857143x + 188.0816328 + x2 = 100.5714286 + 188.0816328

Reorder the terms:
188.0816328 + 27.42857143x + x2 = 100.5714286 + 188.0816328

Combine like terms: 100.5714286 + 188.0816328 = 288.6530614
188.0816328 + 27.42857143x + x2 = 288.6530614

Factor a perfect square on the left side:
(x + 13.71428572)(x + 13.71428572) = 288.6530614

Calculate the square root of the right side: 16.989792859

Break this problem into two subproblems by setting 
(x + 13.71428572) equal to 16.989792859 and -16.989792859.

Subproblem 1

x + 13.71428572 = 16.989792859 Simplifying x + 13.71428572 = 16.989792859 Reorder the terms: 13.71428572 + x = 16.989792859 Solving 13.71428572 + x = 16.989792859 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-13.71428572' to each side of the equation. 13.71428572 + -13.71428572 + x = 16.989792859 + -13.71428572 Combine like terms: 13.71428572 + -13.71428572 = 0.00000000 0.00000000 + x = 16.989792859 + -13.71428572 x = 16.989792859 + -13.71428572 Combine like terms: 16.989792859 + -13.71428572 = 3.275507139 x = 3.275507139 Simplifying x = 3.275507139

Subproblem 2

x + 13.71428572 = -16.989792859 Simplifying x + 13.71428572 = -16.989792859 Reorder the terms: 13.71428572 + x = -16.989792859 Solving 13.71428572 + x = -16.989792859 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-13.71428572' to each side of the equation. 13.71428572 + -13.71428572 + x = -16.989792859 + -13.71428572 Combine like terms: 13.71428572 + -13.71428572 = 0.00000000 0.00000000 + x = -16.989792859 + -13.71428572 x = -16.989792859 + -13.71428572 Combine like terms: -16.989792859 + -13.71428572 = -30.704078579 x = -30.704078579 Simplifying x = -30.704078579

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.275507139, -30.704078579}

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