4x^2+27x-4=0

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


Simplifying
4x2 + 27x + -4 = 0

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

Solving
-4 + 27x + 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'.
-1 + 6.75x + x2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + 6.75x + 1 + x2 = 0 + 1

Reorder the terms:
-1 + 1 + 6.75x + x2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 6.75x + x2 = 0 + 1
6.75x + x2 = 0 + 1

Combine like terms: 0 + 1 = 1
6.75x + x2 = 1

The x term is 6.75x.  Take half its coefficient (3.375).
Square it (11.390625) and add it to both sides.

Add '11.390625' to each side of the equation.
6.75x + 11.390625 + x2 = 1 + 11.390625

Reorder the terms:
11.390625 + 6.75x + x2 = 1 + 11.390625

Combine like terms: 1 + 11.390625 = 12.390625
11.390625 + 6.75x + x2 = 12.390625

Factor a perfect square on the left side:
(x + 3.375)(x + 3.375) = 12.390625

Calculate the square root of the right side: 3.52003196

Break this problem into two subproblems by setting 
(x + 3.375) equal to 3.52003196 and -3.52003196.

Subproblem 1

x + 3.375 = 3.52003196 Simplifying x + 3.375 = 3.52003196 Reorder the terms: 3.375 + x = 3.52003196 Solving 3.375 + x = 3.52003196 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.375' to each side of the equation. 3.375 + -3.375 + x = 3.52003196 + -3.375 Combine like terms: 3.375 + -3.375 = 0.000 0.000 + x = 3.52003196 + -3.375 x = 3.52003196 + -3.375 Combine like terms: 3.52003196 + -3.375 = 0.14503196 x = 0.14503196 Simplifying x = 0.14503196

Subproblem 2

x + 3.375 = -3.52003196 Simplifying x + 3.375 = -3.52003196 Reorder the terms: 3.375 + x = -3.52003196 Solving 3.375 + x = -3.52003196 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.375' to each side of the equation. 3.375 + -3.375 + x = -3.52003196 + -3.375 Combine like terms: 3.375 + -3.375 = 0.000 0.000 + x = -3.52003196 + -3.375 x = -3.52003196 + -3.375 Combine like terms: -3.52003196 + -3.375 = -6.89503196 x = -6.89503196 Simplifying x = -6.89503196

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.14503196, -6.89503196}

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