4x^2+6x-27=0

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Solution for 4x^2+6x-27=0 equation:


Simplifying
4x2 + 6x + -27 = 0

Reorder the terms:
-27 + 6x + 4x2 = 0

Solving
-27 + 6x + 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'.
-6.75 + 1.5x + x2 = 0

Move the constant term to the right:

Add '6.75' to each side of the equation.
-6.75 + 1.5x + 6.75 + x2 = 0 + 6.75

Reorder the terms:
-6.75 + 6.75 + 1.5x + x2 = 0 + 6.75

Combine like terms: -6.75 + 6.75 = 0.00
0.00 + 1.5x + x2 = 0 + 6.75
1.5x + x2 = 0 + 6.75

Combine like terms: 0 + 6.75 = 6.75
1.5x + x2 = 6.75

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 = 6.75 + 0.5625

Reorder the terms:
0.5625 + 1.5x + x2 = 6.75 + 0.5625

Combine like terms: 6.75 + 0.5625 = 7.3125
0.5625 + 1.5x + x2 = 7.3125

Factor a perfect square on the left side:
(x + 0.75)(x + 0.75) = 7.3125

Calculate the square root of the right side: 2.704163457

Break this problem into two subproblems by setting 
(x + 0.75) equal to 2.704163457 and -2.704163457.

Subproblem 1

x + 0.75 = 2.704163457 Simplifying x + 0.75 = 2.704163457 Reorder the terms: 0.75 + x = 2.704163457 Solving 0.75 + x = 2.704163457 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 = 2.704163457 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = 2.704163457 + -0.75 x = 2.704163457 + -0.75 Combine like terms: 2.704163457 + -0.75 = 1.954163457 x = 1.954163457 Simplifying x = 1.954163457

Subproblem 2

x + 0.75 = -2.704163457 Simplifying x + 0.75 = -2.704163457 Reorder the terms: 0.75 + x = -2.704163457 Solving 0.75 + x = -2.704163457 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 = -2.704163457 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = -2.704163457 + -0.75 x = -2.704163457 + -0.75 Combine like terms: -2.704163457 + -0.75 = -3.454163457 x = -3.454163457 Simplifying x = -3.454163457

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.954163457, -3.454163457}

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