-16x^2+71x+6=0

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Solution for -16x^2+71x+6=0 equation:


Simplifying
-16x2 + 71x + 6 = 0

Reorder the terms:
6 + 71x + -16x2 = 0

Solving
6 + 71x + -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'.
-0.375 + -4.4375x + x2 = 0

Move the constant term to the right:

Add '0.375' to each side of the equation.
-0.375 + -4.4375x + 0.375 + x2 = 0 + 0.375

Reorder the terms:
-0.375 + 0.375 + -4.4375x + x2 = 0 + 0.375

Combine like terms: -0.375 + 0.375 = 0.000
0.000 + -4.4375x + x2 = 0 + 0.375
-4.4375x + x2 = 0 + 0.375

Combine like terms: 0 + 0.375 = 0.375
-4.4375x + x2 = 0.375

The x term is -4.4375x.  Take half its coefficient (-2.21875).
Square it (4.922851563) and add it to both sides.

Add '4.922851563' to each side of the equation.
-4.4375x + 4.922851563 + x2 = 0.375 + 4.922851563

Reorder the terms:
4.922851563 + -4.4375x + x2 = 0.375 + 4.922851563

Combine like terms: 0.375 + 4.922851563 = 5.297851563
4.922851563 + -4.4375x + x2 = 5.297851563

Factor a perfect square on the left side:
(x + -2.21875)(x + -2.21875) = 5.297851563

Calculate the square root of the right side: 2.301706229

Break this problem into two subproblems by setting 
(x + -2.21875) equal to 2.301706229 and -2.301706229.

Subproblem 1

x + -2.21875 = 2.301706229 Simplifying x + -2.21875 = 2.301706229 Reorder the terms: -2.21875 + x = 2.301706229 Solving -2.21875 + x = 2.301706229 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.21875' to each side of the equation. -2.21875 + 2.21875 + x = 2.301706229 + 2.21875 Combine like terms: -2.21875 + 2.21875 = 0.00000 0.00000 + x = 2.301706229 + 2.21875 x = 2.301706229 + 2.21875 Combine like terms: 2.301706229 + 2.21875 = 4.520456229 x = 4.520456229 Simplifying x = 4.520456229

Subproblem 2

x + -2.21875 = -2.301706229 Simplifying x + -2.21875 = -2.301706229 Reorder the terms: -2.21875 + x = -2.301706229 Solving -2.21875 + x = -2.301706229 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.21875' to each side of the equation. -2.21875 + 2.21875 + x = -2.301706229 + 2.21875 Combine like terms: -2.21875 + 2.21875 = 0.00000 0.00000 + x = -2.301706229 + 2.21875 x = -2.301706229 + 2.21875 Combine like terms: -2.301706229 + 2.21875 = -0.082956229 x = -0.082956229 Simplifying x = -0.082956229

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.520456229, -0.082956229}

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