-16x^2+63.5x+2=0

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Solution for -16x^2+63.5x+2=0 equation:


Simplifying
-16x2 + 63.5x + 2 = 0

Reorder the terms:
2 + 63.5x + -16x2 = 0

Solving
2 + 63.5x + -16x2 = 0

Solving for variable 'x'.

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

Divide each side by '-16'.
-0.125 + -3.96875x + x2 = 0

Move the constant term to the right:

Add '0.125' to each side of the equation.
-0.125 + -3.96875x + 0.125 + x2 = 0 + 0.125

Reorder the terms:
-0.125 + 0.125 + -3.96875x + x2 = 0 + 0.125

Combine like terms: -0.125 + 0.125 = 0.000
0.000 + -3.96875x + x2 = 0 + 0.125
-3.96875x + x2 = 0 + 0.125

Combine like terms: 0 + 0.125 = 0.125
-3.96875x + x2 = 0.125

The x term is -3.96875x.  Take half its coefficient (-1.984375).
Square it (3.937744141) and add it to both sides.

Add '3.937744141' to each side of the equation.
-3.96875x + 3.937744141 + x2 = 0.125 + 3.937744141

Reorder the terms:
3.937744141 + -3.96875x + x2 = 0.125 + 3.937744141

Combine like terms: 0.125 + 3.937744141 = 4.062744141
3.937744141 + -3.96875x + x2 = 4.062744141

Factor a perfect square on the left side:
(x + -1.984375)(x + -1.984375) = 4.062744141

Calculate the square root of the right side: 2.015625

Break this problem into two subproblems by setting 
(x + -1.984375) equal to 2.015625 and -2.015625.

Subproblem 1

x + -1.984375 = 2.015625 Simplifying x + -1.984375 = 2.015625 Reorder the terms: -1.984375 + x = 2.015625 Solving -1.984375 + x = 2.015625 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.984375' to each side of the equation. -1.984375 + 1.984375 + x = 2.015625 + 1.984375 Combine like terms: -1.984375 + 1.984375 = 0.000000 0.000000 + x = 2.015625 + 1.984375 x = 2.015625 + 1.984375 Combine like terms: 2.015625 + 1.984375 = 4 x = 4 Simplifying x = 4

Subproblem 2

x + -1.984375 = -2.015625 Simplifying x + -1.984375 = -2.015625 Reorder the terms: -1.984375 + x = -2.015625 Solving -1.984375 + x = -2.015625 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.984375' to each side of the equation. -1.984375 + 1.984375 + x = -2.015625 + 1.984375 Combine like terms: -1.984375 + 1.984375 = 0.000000 0.000000 + x = -2.015625 + 1.984375 x = -2.015625 + 1.984375 Combine like terms: -2.015625 + 1.984375 = -0.03125 x = -0.03125 Simplifying x = -0.03125

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4, -0.03125}

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