8=4+17x-16x^2

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Solution for 8=4+17x-16x^2 equation:


Simplifying
8 = 4 + 17x + -16x2

Solving
8 = 4 + 17x + -16x2

Solving for variable 'x'.

Combine like terms: 8 + -4 = 4
4 + -17x + 16x2 = 4 + 17x + -16x2 + -4 + -17x + 16x2

Reorder the terms:
4 + -17x + 16x2 = 4 + -4 + 17x + -17x + -16x2 + 16x2

Combine like terms: 4 + -4 = 0
4 + -17x + 16x2 = 0 + 17x + -17x + -16x2 + 16x2
4 + -17x + 16x2 = 17x + -17x + -16x2 + 16x2

Combine like terms: 17x + -17x = 0
4 + -17x + 16x2 = 0 + -16x2 + 16x2
4 + -17x + 16x2 = -16x2 + 16x2

Combine like terms: -16x2 + 16x2 = 0
4 + -17x + 16x2 = 0

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

Divide each side by '16'.
0.25 + -1.0625x + x2 = 0

Move the constant term to the right:

Add '-0.25' to each side of the equation.
0.25 + -1.0625x + -0.25 + x2 = 0 + -0.25

Reorder the terms:
0.25 + -0.25 + -1.0625x + x2 = 0 + -0.25

Combine like terms: 0.25 + -0.25 = 0.00
0.00 + -1.0625x + x2 = 0 + -0.25
-1.0625x + x2 = 0 + -0.25

Combine like terms: 0 + -0.25 = -0.25
-1.0625x + x2 = -0.25

The x term is -1.0625x.  Take half its coefficient (-0.53125).
Square it (0.2822265625) and add it to both sides.

Add '0.2822265625' to each side of the equation.
-1.0625x + 0.2822265625 + x2 = -0.25 + 0.2822265625

Reorder the terms:
0.2822265625 + -1.0625x + x2 = -0.25 + 0.2822265625

Combine like terms: -0.25 + 0.2822265625 = 0.0322265625
0.2822265625 + -1.0625x + x2 = 0.0322265625

Factor a perfect square on the left side:
(x + -0.53125)(x + -0.53125) = 0.0322265625

Calculate the square root of the right side: 0.179517583

Break this problem into two subproblems by setting 
(x + -0.53125) equal to 0.179517583 and -0.179517583.

Subproblem 1

x + -0.53125 = 0.179517583 Simplifying x + -0.53125 = 0.179517583 Reorder the terms: -0.53125 + x = 0.179517583 Solving -0.53125 + x = 0.179517583 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.53125' to each side of the equation. -0.53125 + 0.53125 + x = 0.179517583 + 0.53125 Combine like terms: -0.53125 + 0.53125 = 0.00000 0.00000 + x = 0.179517583 + 0.53125 x = 0.179517583 + 0.53125 Combine like terms: 0.179517583 + 0.53125 = 0.710767583 x = 0.710767583 Simplifying x = 0.710767583

Subproblem 2

x + -0.53125 = -0.179517583 Simplifying x + -0.53125 = -0.179517583 Reorder the terms: -0.53125 + x = -0.179517583 Solving -0.53125 + x = -0.179517583 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.53125' to each side of the equation. -0.53125 + 0.53125 + x = -0.179517583 + 0.53125 Combine like terms: -0.53125 + 0.53125 = 0.00000 0.00000 + x = -0.179517583 + 0.53125 x = -0.179517583 + 0.53125 Combine like terms: -0.179517583 + 0.53125 = 0.351732417 x = 0.351732417 Simplifying x = 0.351732417

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.710767583, 0.351732417}

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