4x^2+3x-1800=0

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Solution for 4x^2+3x-1800=0 equation:


Simplifying
4x2 + 3x + -1800 = 0

Reorder the terms:
-1800 + 3x + 4x2 = 0

Solving
-1800 + 3x + 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'.
-450 + 0.75x + x2 = 0

Move the constant term to the right:

Add '450' to each side of the equation.
-450 + 0.75x + 450 + x2 = 0 + 450

Reorder the terms:
-450 + 450 + 0.75x + x2 = 0 + 450

Combine like terms: -450 + 450 = 0
0 + 0.75x + x2 = 0 + 450
0.75x + x2 = 0 + 450

Combine like terms: 0 + 450 = 450
0.75x + x2 = 450

The x term is 0.75x.  Take half its coefficient (0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
0.75x + 0.140625 + x2 = 450 + 0.140625

Reorder the terms:
0.140625 + 0.75x + x2 = 450 + 0.140625

Combine like terms: 450 + 0.140625 = 450.140625
0.140625 + 0.75x + x2 = 450.140625

Factor a perfect square on the left side:
(x + 0.375)(x + 0.375) = 450.140625

Calculate the square root of the right side: 21.21651774

Break this problem into two subproblems by setting 
(x + 0.375) equal to 21.21651774 and -21.21651774.

Subproblem 1

x + 0.375 = 21.21651774 Simplifying x + 0.375 = 21.21651774 Reorder the terms: 0.375 + x = 21.21651774 Solving 0.375 + x = 21.21651774 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.375' to each side of the equation. 0.375 + -0.375 + x = 21.21651774 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + x = 21.21651774 + -0.375 x = 21.21651774 + -0.375 Combine like terms: 21.21651774 + -0.375 = 20.84151774 x = 20.84151774 Simplifying x = 20.84151774

Subproblem 2

x + 0.375 = -21.21651774 Simplifying x + 0.375 = -21.21651774 Reorder the terms: 0.375 + x = -21.21651774 Solving 0.375 + x = -21.21651774 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.375' to each side of the equation. 0.375 + -0.375 + x = -21.21651774 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + x = -21.21651774 + -0.375 x = -21.21651774 + -0.375 Combine like terms: -21.21651774 + -0.375 = -21.59151774 x = -21.59151774 Simplifying x = -21.59151774

Solution

The solution to the problem is based on the solutions from the subproblems. x = {20.84151774, -21.59151774}

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