6x^2+2.5x-1.5=

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Solution for 6x^2+2.5x-1.5= equation:


Simplifying
6x2 + 2.5x + -1.5 = 0

Reorder the terms:
-1.5 + 2.5x + 6x2 = 0

Solving
-1.5 + 2.5x + 6x2 = 0

Solving for variable 'x'.

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

Divide each side by '6'.
-0.25 + 0.4166666667x + x2 = 0

Move the constant term to the right:

Add '0.25' to each side of the equation.
-0.25 + 0.4166666667x + 0.25 + x2 = 0 + 0.25

Reorder the terms:
-0.25 + 0.25 + 0.4166666667x + x2 = 0 + 0.25

Combine like terms: -0.25 + 0.25 = 0.00
0.00 + 0.4166666667x + x2 = 0 + 0.25
0.4166666667x + x2 = 0 + 0.25

Combine like terms: 0 + 0.25 = 0.25
0.4166666667x + x2 = 0.25

The x term is 0.4166666667x.  Take half its coefficient (0.2083333334).
Square it (0.04340277781) and add it to both sides.

Add '0.04340277781' to each side of the equation.
0.4166666667x + 0.04340277781 + x2 = 0.25 + 0.04340277781

Reorder the terms:
0.04340277781 + 0.4166666667x + x2 = 0.25 + 0.04340277781

Combine like terms: 0.25 + 0.04340277781 = 0.29340277781
0.04340277781 + 0.4166666667x + x2 = 0.29340277781

Factor a perfect square on the left side:
(x + 0.2083333334)(x + 0.2083333334) = 0.29340277781

Calculate the square root of the right side: 0.541666667

Break this problem into two subproblems by setting 
(x + 0.2083333334) equal to 0.541666667 and -0.541666667.

Subproblem 1

x + 0.2083333334 = 0.541666667 Simplifying x + 0.2083333334 = 0.541666667 Reorder the terms: 0.2083333334 + x = 0.541666667 Solving 0.2083333334 + x = 0.541666667 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2083333334' to each side of the equation. 0.2083333334 + -0.2083333334 + x = 0.541666667 + -0.2083333334 Combine like terms: 0.2083333334 + -0.2083333334 = 0.0000000000 0.0000000000 + x = 0.541666667 + -0.2083333334 x = 0.541666667 + -0.2083333334 Combine like terms: 0.541666667 + -0.2083333334 = 0.3333333336 x = 0.3333333336 Simplifying x = 0.3333333336

Subproblem 2

x + 0.2083333334 = -0.541666667 Simplifying x + 0.2083333334 = -0.541666667 Reorder the terms: 0.2083333334 + x = -0.541666667 Solving 0.2083333334 + x = -0.541666667 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2083333334' to each side of the equation. 0.2083333334 + -0.2083333334 + x = -0.541666667 + -0.2083333334 Combine like terms: 0.2083333334 + -0.2083333334 = 0.0000000000 0.0000000000 + x = -0.541666667 + -0.2083333334 x = -0.541666667 + -0.2083333334 Combine like terms: -0.541666667 + -0.2083333334 = -0.7500000004 x = -0.7500000004 Simplifying x = -0.7500000004

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.3333333336, -0.7500000004}

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