0=4x^2+8x+1

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Solution for 0=4x^2+8x+1 equation:


Simplifying
0 = 4x2 + 8x + 1

Reorder the terms:
0 = 1 + 8x + 4x2

Solving
0 = 1 + 8x + 4x2

Solving for variable 'x'.

Combine like terms: 0 + -1 = -1
-1 + -8x + -4x2 = 1 + 8x + 4x2 + -1 + -8x + -4x2

Reorder the terms:
-1 + -8x + -4x2 = 1 + -1 + 8x + -8x + 4x2 + -4x2

Combine like terms: 1 + -1 = 0
-1 + -8x + -4x2 = 0 + 8x + -8x + 4x2 + -4x2
-1 + -8x + -4x2 = 8x + -8x + 4x2 + -4x2

Combine like terms: 8x + -8x = 0
-1 + -8x + -4x2 = 0 + 4x2 + -4x2
-1 + -8x + -4x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
-1 + -8x + -4x2 = 0

Factor out the Greatest Common Factor (GCF), '-1'.
-1(1 + 8x + 4x2) = 0

Ignore the factor -1.

Subproblem 1

Set the factor '(1 + 8x + 4x2)' equal to zero and attempt to solve: Simplifying 1 + 8x + 4x2 = 0 Solving 1 + 8x + 4x2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. 0.25 + 2x + x2 = 0 Move the constant term to the right: Add '-0.25' to each side of the equation. 0.25 + 2x + -0.25 + x2 = 0 + -0.25 Reorder the terms: 0.25 + -0.25 + 2x + x2 = 0 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + 2x + x2 = 0 + -0.25 2x + x2 = 0 + -0.25 Combine like terms: 0 + -0.25 = -0.25 2x + x2 = -0.25 The x term is 2x. Take half its coefficient (1). Square it (1) and add it to both sides. Add '1' to each side of the equation. 2x + 1 + x2 = -0.25 + 1 Reorder the terms: 1 + 2x + x2 = -0.25 + 1 Combine like terms: -0.25 + 1 = 0.75 1 + 2x + x2 = 0.75 Factor a perfect square on the left side: (x + 1)(x + 1) = 0.75 Calculate the square root of the right side: 0.866025404 Break this problem into two subproblems by setting (x + 1) equal to 0.866025404 and -0.866025404.

Subproblem 1

x + 1 = 0.866025404 Simplifying x + 1 = 0.866025404 Reorder the terms: 1 + x = 0.866025404 Solving 1 + x = 0.866025404 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 0.866025404 + -1 Combine like terms: 1 + -1 = 0 0 + x = 0.866025404 + -1 x = 0.866025404 + -1 Combine like terms: 0.866025404 + -1 = -0.133974596 x = -0.133974596 Simplifying x = -0.133974596

Subproblem 2

x + 1 = -0.866025404 Simplifying x + 1 = -0.866025404 Reorder the terms: 1 + x = -0.866025404 Solving 1 + x = -0.866025404 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -0.866025404 + -1 Combine like terms: 1 + -1 = 0 0 + x = -0.866025404 + -1 x = -0.866025404 + -1 Combine like terms: -0.866025404 + -1 = -1.866025404 x = -1.866025404 Simplifying x = -1.866025404

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.133974596, -1.866025404}

Solution

x = {-0.133974596, -1.866025404}

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