-4x^2-16x-3=0

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Solution for -4x^2-16x-3=0 equation:


Simplifying
-4x2 + -16x + -3 = 0

Reorder the terms:
-3 + -16x + -4x2 = 0

Solving
-3 + -16x + -4x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '-1'.
-1(3 + 16x + 4x2) = 0

Ignore the factor -1.

Subproblem 1

Set the factor '(3 + 16x + 4x2)' equal to zero and attempt to solve: Simplifying 3 + 16x + 4x2 = 0 Solving 3 + 16x + 4x2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. 0.75 + 4x + x2 = 0 Move the constant term to the right: Add '-0.75' to each side of the equation. 0.75 + 4x + -0.75 + x2 = 0 + -0.75 Reorder the terms: 0.75 + -0.75 + 4x + x2 = 0 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + 4x + x2 = 0 + -0.75 4x + x2 = 0 + -0.75 Combine like terms: 0 + -0.75 = -0.75 4x + x2 = -0.75 The x term is 4x. Take half its coefficient (2). Square it (4) and add it to both sides. Add '4' to each side of the equation. 4x + 4 + x2 = -0.75 + 4 Reorder the terms: 4 + 4x + x2 = -0.75 + 4 Combine like terms: -0.75 + 4 = 3.25 4 + 4x + x2 = 3.25 Factor a perfect square on the left side: (x + 2)(x + 2) = 3.25 Calculate the square root of the right side: 1.802775638 Break this problem into two subproblems by setting (x + 2) equal to 1.802775638 and -1.802775638.

Subproblem 1

x + 2 = 1.802775638 Simplifying x + 2 = 1.802775638 Reorder the terms: 2 + x = 1.802775638 Solving 2 + x = 1.802775638 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 1.802775638 + -2 Combine like terms: 2 + -2 = 0 0 + x = 1.802775638 + -2 x = 1.802775638 + -2 Combine like terms: 1.802775638 + -2 = -0.197224362 x = -0.197224362 Simplifying x = -0.197224362

Subproblem 2

x + 2 = -1.802775638 Simplifying x + 2 = -1.802775638 Reorder the terms: 2 + x = -1.802775638 Solving 2 + x = -1.802775638 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -1.802775638 + -2 Combine like terms: 2 + -2 = 0 0 + x = -1.802775638 + -2 x = -1.802775638 + -2 Combine like terms: -1.802775638 + -2 = -3.802775638 x = -3.802775638 Simplifying x = -3.802775638

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.197224362, -3.802775638}

Solution

x = {-0.197224362, -3.802775638}

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