5x(4+6x)-3=

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Solution for 5x(4+6x)-3= equation:


Simplifying
5x(4 + 6x) + -3 = 0
(4 * 5x + 6x * 5x) + -3 = 0
(20x + 30x2) + -3 = 0

Reorder the terms:
-3 + 20x + 30x2 = 0

Solving
-3 + 20x + 30x2 = 0

Solving for variable 'x'.

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

Divide each side by '30'.
-0.1 + 0.6666666667x + x2 = 0.0

Move the constant term to the right:

Add '0.1' to each side of the equation.
-0.1 + 0.6666666667x + 0.1 + x2 = 0.0 + 0.1

Reorder the terms:
-0.1 + 0.1 + 0.6666666667x + x2 = 0.0 + 0.1

Combine like terms: -0.1 + 0.1 = 0.0
0.0 + 0.6666666667x + x2 = 0.0 + 0.1
0.6666666667x + x2 = 0.0 + 0.1

Combine like terms: 0.0 + 0.1 = 0.1
0.6666666667x + x2 = 0.1

The x term is 0.6666666667x.  Take half its coefficient (0.3333333334).
Square it (0.1111111112) and add it to both sides.

Add '0.1111111112' to each side of the equation.
0.6666666667x + 0.1111111112 + x2 = 0.1 + 0.1111111112

Reorder the terms:
0.1111111112 + 0.6666666667x + x2 = 0.1 + 0.1111111112

Combine like terms: 0.1 + 0.1111111112 = 0.2111111112
0.1111111112 + 0.6666666667x + x2 = 0.2111111112

Factor a perfect square on the left side:
(x + 0.3333333334)(x + 0.3333333334) = 0.2111111112

Calculate the square root of the right side: 0.459468292

Break this problem into two subproblems by setting 
(x + 0.3333333334) equal to 0.459468292 and -0.459468292.

Subproblem 1

x + 0.3333333334 = 0.459468292 Simplifying x + 0.3333333334 = 0.459468292 Reorder the terms: 0.3333333334 + x = 0.459468292 Solving 0.3333333334 + x = 0.459468292 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3333333334' to each side of the equation. 0.3333333334 + -0.3333333334 + x = 0.459468292 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + x = 0.459468292 + -0.3333333334 x = 0.459468292 + -0.3333333334 Combine like terms: 0.459468292 + -0.3333333334 = 0.1261349586 x = 0.1261349586 Simplifying x = 0.1261349586

Subproblem 2

x + 0.3333333334 = -0.459468292 Simplifying x + 0.3333333334 = -0.459468292 Reorder the terms: 0.3333333334 + x = -0.459468292 Solving 0.3333333334 + x = -0.459468292 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3333333334' to each side of the equation. 0.3333333334 + -0.3333333334 + x = -0.459468292 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + x = -0.459468292 + -0.3333333334 x = -0.459468292 + -0.3333333334 Combine like terms: -0.459468292 + -0.3333333334 = -0.7928016254 x = -0.7928016254 Simplifying x = -0.7928016254

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.1261349586, -0.7928016254}

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