10x^2+3x-225=0

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Solution for 10x^2+3x-225=0 equation:


Simplifying
10x2 + 3x + -225 = 0

Reorder the terms:
-225 + 3x + 10x2 = 0

Solving
-225 + 3x + 10x2 = 0

Solving for variable 'x'.

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

Divide each side by '10'.
-22.5 + 0.3x + x2 = 0

Move the constant term to the right:

Add '22.5' to each side of the equation.
-22.5 + 0.3x + 22.5 + x2 = 0 + 22.5

Reorder the terms:
-22.5 + 22.5 + 0.3x + x2 = 0 + 22.5

Combine like terms: -22.5 + 22.5 = 0.0
0.0 + 0.3x + x2 = 0 + 22.5
0.3x + x2 = 0 + 22.5

Combine like terms: 0 + 22.5 = 22.5
0.3x + x2 = 22.5

The x term is 0.3x.  Take half its coefficient (0.15).
Square it (0.0225) and add it to both sides.

Add '0.0225' to each side of the equation.
0.3x + 0.0225 + x2 = 22.5 + 0.0225

Reorder the terms:
0.0225 + 0.3x + x2 = 22.5 + 0.0225

Combine like terms: 22.5 + 0.0225 = 22.5225
0.0225 + 0.3x + x2 = 22.5225

Factor a perfect square on the left side:
(x + 0.15)(x + 0.15) = 22.5225

Calculate the square root of the right side: 4.745787606

Break this problem into two subproblems by setting 
(x + 0.15) equal to 4.745787606 and -4.745787606.

Subproblem 1

x + 0.15 = 4.745787606 Simplifying x + 0.15 = 4.745787606 Reorder the terms: 0.15 + x = 4.745787606 Solving 0.15 + x = 4.745787606 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.15' to each side of the equation. 0.15 + -0.15 + x = 4.745787606 + -0.15 Combine like terms: 0.15 + -0.15 = 0.00 0.00 + x = 4.745787606 + -0.15 x = 4.745787606 + -0.15 Combine like terms: 4.745787606 + -0.15 = 4.595787606 x = 4.595787606 Simplifying x = 4.595787606

Subproblem 2

x + 0.15 = -4.745787606 Simplifying x + 0.15 = -4.745787606 Reorder the terms: 0.15 + x = -4.745787606 Solving 0.15 + x = -4.745787606 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.15' to each side of the equation. 0.15 + -0.15 + x = -4.745787606 + -0.15 Combine like terms: 0.15 + -0.15 = 0.00 0.00 + x = -4.745787606 + -0.15 x = -4.745787606 + -0.15 Combine like terms: -4.745787606 + -0.15 = -4.895787606 x = -4.895787606 Simplifying x = -4.895787606

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.595787606, -4.895787606}

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