9x-4x^2+5=0

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Solution for 9x-4x^2+5=0 equation:


Simplifying
9x + -4x2 + 5 = 0

Reorder the terms:
5 + 9x + -4x2 = 0

Solving
5 + 9x + -4x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
-1.25 + -2.25x + x2 = 0

Move the constant term to the right:

Add '1.25' to each side of the equation.
-1.25 + -2.25x + 1.25 + x2 = 0 + 1.25

Reorder the terms:
-1.25 + 1.25 + -2.25x + x2 = 0 + 1.25

Combine like terms: -1.25 + 1.25 = 0.00
0.00 + -2.25x + x2 = 0 + 1.25
-2.25x + x2 = 0 + 1.25

Combine like terms: 0 + 1.25 = 1.25
-2.25x + x2 = 1.25

The x term is -2.25x.  Take half its coefficient (-1.125).
Square it (1.265625) and add it to both sides.

Add '1.265625' to each side of the equation.
-2.25x + 1.265625 + x2 = 1.25 + 1.265625

Reorder the terms:
1.265625 + -2.25x + x2 = 1.25 + 1.265625

Combine like terms: 1.25 + 1.265625 = 2.515625
1.265625 + -2.25x + x2 = 2.515625

Factor a perfect square on the left side:
(x + -1.125)(x + -1.125) = 2.515625

Calculate the square root of the right side: 1.586072193

Break this problem into two subproblems by setting 
(x + -1.125) equal to 1.586072193 and -1.586072193.

Subproblem 1

x + -1.125 = 1.586072193 Simplifying x + -1.125 = 1.586072193 Reorder the terms: -1.125 + x = 1.586072193 Solving -1.125 + x = 1.586072193 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.125' to each side of the equation. -1.125 + 1.125 + x = 1.586072193 + 1.125 Combine like terms: -1.125 + 1.125 = 0.000 0.000 + x = 1.586072193 + 1.125 x = 1.586072193 + 1.125 Combine like terms: 1.586072193 + 1.125 = 2.711072193 x = 2.711072193 Simplifying x = 2.711072193

Subproblem 2

x + -1.125 = -1.586072193 Simplifying x + -1.125 = -1.586072193 Reorder the terms: -1.125 + x = -1.586072193 Solving -1.125 + x = -1.586072193 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.125' to each side of the equation. -1.125 + 1.125 + x = -1.586072193 + 1.125 Combine like terms: -1.125 + 1.125 = 0.000 0.000 + x = -1.586072193 + 1.125 x = -1.586072193 + 1.125 Combine like terms: -1.586072193 + 1.125 = -0.461072193 x = -0.461072193 Simplifying x = -0.461072193

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.711072193, -0.461072193}

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