-16x^2+23x+9=0

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Solution for -16x^2+23x+9=0 equation:


Simplifying
-16x2 + 23x + 9 = 0

Reorder the terms:
9 + 23x + -16x2 = 0

Solving
9 + 23x + -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'.
-0.5625 + -1.4375x + x2 = 0

Move the constant term to the right:

Add '0.5625' to each side of the equation.
-0.5625 + -1.4375x + 0.5625 + x2 = 0 + 0.5625

Reorder the terms:
-0.5625 + 0.5625 + -1.4375x + x2 = 0 + 0.5625

Combine like terms: -0.5625 + 0.5625 = 0.0000
0.0000 + -1.4375x + x2 = 0 + 0.5625
-1.4375x + x2 = 0 + 0.5625

Combine like terms: 0 + 0.5625 = 0.5625
-1.4375x + x2 = 0.5625

The x term is -1.4375x.  Take half its coefficient (-0.71875).
Square it (0.5166015625) and add it to both sides.

Add '0.5166015625' to each side of the equation.
-1.4375x + 0.5166015625 + x2 = 0.5625 + 0.5166015625

Reorder the terms:
0.5166015625 + -1.4375x + x2 = 0.5625 + 0.5166015625

Combine like terms: 0.5625 + 0.5166015625 = 1.0791015625
0.5166015625 + -1.4375x + x2 = 1.0791015625

Factor a perfect square on the left side:
(x + -0.71875)(x + -0.71875) = 1.0791015625

Calculate the square root of the right side: 1.038798134

Break this problem into two subproblems by setting 
(x + -0.71875) equal to 1.038798134 and -1.038798134.

Subproblem 1

x + -0.71875 = 1.038798134 Simplifying x + -0.71875 = 1.038798134 Reorder the terms: -0.71875 + x = 1.038798134 Solving -0.71875 + x = 1.038798134 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.71875' to each side of the equation. -0.71875 + 0.71875 + x = 1.038798134 + 0.71875 Combine like terms: -0.71875 + 0.71875 = 0.00000 0.00000 + x = 1.038798134 + 0.71875 x = 1.038798134 + 0.71875 Combine like terms: 1.038798134 + 0.71875 = 1.757548134 x = 1.757548134 Simplifying x = 1.757548134

Subproblem 2

x + -0.71875 = -1.038798134 Simplifying x + -0.71875 = -1.038798134 Reorder the terms: -0.71875 + x = -1.038798134 Solving -0.71875 + x = -1.038798134 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.71875' to each side of the equation. -0.71875 + 0.71875 + x = -1.038798134 + 0.71875 Combine like terms: -0.71875 + 0.71875 = 0.00000 0.00000 + x = -1.038798134 + 0.71875 x = -1.038798134 + 0.71875 Combine like terms: -1.038798134 + 0.71875 = -0.320048134 x = -0.320048134 Simplifying x = -0.320048134

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.757548134, -0.320048134}

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