x(2x+3)=190

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Solution for x(2x+3)=190 equation:


Simplifying
x(2x + 3) = 190

Reorder the terms:
x(3 + 2x) = 190
(3 * x + 2x * x) = 190
(3x + 2x2) = 190

Solving
3x + 2x2 = 190

Solving for variable 'x'.

Reorder the terms:
-190 + 3x + 2x2 = 190 + -190

Combine like terms: 190 + -190 = 0
-190 + 3x + 2x2 = 0

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

Divide each side by '2'.
-95 + 1.5x + x2 = 0

Move the constant term to the right:

Add '95' to each side of the equation.
-95 + 1.5x + 95 + x2 = 0 + 95

Reorder the terms:
-95 + 95 + 1.5x + x2 = 0 + 95

Combine like terms: -95 + 95 = 0
0 + 1.5x + x2 = 0 + 95
1.5x + x2 = 0 + 95

Combine like terms: 0 + 95 = 95
1.5x + x2 = 95

The x term is 1.5x.  Take half its coefficient (0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
1.5x + 0.5625 + x2 = 95 + 0.5625

Reorder the terms:
0.5625 + 1.5x + x2 = 95 + 0.5625

Combine like terms: 95 + 0.5625 = 95.5625
0.5625 + 1.5x + x2 = 95.5625

Factor a perfect square on the left side:
(x + 0.75)(x + 0.75) = 95.5625

Calculate the square root of the right side: 9.775607398

Break this problem into two subproblems by setting 
(x + 0.75) equal to 9.775607398 and -9.775607398.

Subproblem 1

x + 0.75 = 9.775607398 Simplifying x + 0.75 = 9.775607398 Reorder the terms: 0.75 + x = 9.775607398 Solving 0.75 + x = 9.775607398 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = 9.775607398 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = 9.775607398 + -0.75 x = 9.775607398 + -0.75 Combine like terms: 9.775607398 + -0.75 = 9.025607398 x = 9.025607398 Simplifying x = 9.025607398

Subproblem 2

x + 0.75 = -9.775607398 Simplifying x + 0.75 = -9.775607398 Reorder the terms: 0.75 + x = -9.775607398 Solving 0.75 + x = -9.775607398 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = -9.775607398 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = -9.775607398 + -0.75 x = -9.775607398 + -0.75 Combine like terms: -9.775607398 + -0.75 = -10.525607398 x = -10.525607398 Simplifying x = -10.525607398

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.025607398, -10.525607398}

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