540=4x^2+23x

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Solution for 540=4x^2+23x equation:


Simplifying
540 = 4x2 + 23x

Reorder the terms:
540 = 23x + 4x2

Solving
540 = 23x + 4x2

Solving for variable 'x'.

Reorder the terms:
540 + -23x + -4x2 = 23x + -23x + 4x2 + -4x2

Combine like terms: 23x + -23x = 0
540 + -23x + -4x2 = 0 + 4x2 + -4x2
540 + -23x + -4x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
540 + -23x + -4x2 = 0

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

Divide each side by '-4'.
-135 + 5.75x + x2 = 0

Move the constant term to the right:

Add '135' to each side of the equation.
-135 + 5.75x + 135 + x2 = 0 + 135

Reorder the terms:
-135 + 135 + 5.75x + x2 = 0 + 135

Combine like terms: -135 + 135 = 0
0 + 5.75x + x2 = 0 + 135
5.75x + x2 = 0 + 135

Combine like terms: 0 + 135 = 135
5.75x + x2 = 135

The x term is 5.75x.  Take half its coefficient (2.875).
Square it (8.265625) and add it to both sides.

Add '8.265625' to each side of the equation.
5.75x + 8.265625 + x2 = 135 + 8.265625

Reorder the terms:
8.265625 + 5.75x + x2 = 135 + 8.265625

Combine like terms: 135 + 8.265625 = 143.265625
8.265625 + 5.75x + x2 = 143.265625

Factor a perfect square on the left side:
(x + 2.875)(x + 2.875) = 143.265625

Calculate the square root of the right side: 11.96936193

Break this problem into two subproblems by setting 
(x + 2.875) equal to 11.96936193 and -11.96936193.

Subproblem 1

x + 2.875 = 11.96936193 Simplifying x + 2.875 = 11.96936193 Reorder the terms: 2.875 + x = 11.96936193 Solving 2.875 + x = 11.96936193 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.875' to each side of the equation. 2.875 + -2.875 + x = 11.96936193 + -2.875 Combine like terms: 2.875 + -2.875 = 0.000 0.000 + x = 11.96936193 + -2.875 x = 11.96936193 + -2.875 Combine like terms: 11.96936193 + -2.875 = 9.09436193 x = 9.09436193 Simplifying x = 9.09436193

Subproblem 2

x + 2.875 = -11.96936193 Simplifying x + 2.875 = -11.96936193 Reorder the terms: 2.875 + x = -11.96936193 Solving 2.875 + x = -11.96936193 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.875' to each side of the equation. 2.875 + -2.875 + x = -11.96936193 + -2.875 Combine like terms: 2.875 + -2.875 = 0.000 0.000 + x = -11.96936193 + -2.875 x = -11.96936193 + -2.875 Combine like terms: -11.96936193 + -2.875 = -14.84436193 x = -14.84436193 Simplifying x = -14.84436193

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.09436193, -14.84436193}

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