2b^2+4b-2=2

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Solution for 2b^2+4b-2=2 equation:


Simplifying
2b2 + 4b + -2 = 2

Reorder the terms:
-2 + 4b + 2b2 = 2

Solving
-2 + 4b + 2b2 = 2

Solving for variable 'b'.

Reorder the terms:
-2 + -2 + 4b + 2b2 = 2 + -2

Combine like terms: -2 + -2 = -4
-4 + 4b + 2b2 = 2 + -2

Combine like terms: 2 + -2 = 0
-4 + 4b + 2b2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-2 + 2b + b2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-2 + 2b + b2)' equal to zero and attempt to solve: Simplifying -2 + 2b + b2 = 0 Solving -2 + 2b + b2 = 0 Begin completing the square. Move the constant term to the right: Add '2' to each side of the equation. -2 + 2b + 2 + b2 = 0 + 2 Reorder the terms: -2 + 2 + 2b + b2 = 0 + 2 Combine like terms: -2 + 2 = 0 0 + 2b + b2 = 0 + 2 2b + b2 = 0 + 2 Combine like terms: 0 + 2 = 2 2b + b2 = 2 The b term is 2b. Take half its coefficient (1). Square it (1) and add it to both sides. Add '1' to each side of the equation. 2b + 1 + b2 = 2 + 1 Reorder the terms: 1 + 2b + b2 = 2 + 1 Combine like terms: 2 + 1 = 3 1 + 2b + b2 = 3 Factor a perfect square on the left side: (b + 1)(b + 1) = 3 Calculate the square root of the right side: 1.732050808 Break this problem into two subproblems by setting (b + 1) equal to 1.732050808 and -1.732050808.

Subproblem 1

b + 1 = 1.732050808 Simplifying b + 1 = 1.732050808 Reorder the terms: 1 + b = 1.732050808 Solving 1 + b = 1.732050808 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + b = 1.732050808 + -1 Combine like terms: 1 + -1 = 0 0 + b = 1.732050808 + -1 b = 1.732050808 + -1 Combine like terms: 1.732050808 + -1 = 0.732050808 b = 0.732050808 Simplifying b = 0.732050808

Subproblem 2

b + 1 = -1.732050808 Simplifying b + 1 = -1.732050808 Reorder the terms: 1 + b = -1.732050808 Solving 1 + b = -1.732050808 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + b = -1.732050808 + -1 Combine like terms: 1 + -1 = 0 0 + b = -1.732050808 + -1 b = -1.732050808 + -1 Combine like terms: -1.732050808 + -1 = -2.732050808 b = -2.732050808 Simplifying b = -2.732050808

Solution

The solution to the problem is based on the solutions from the subproblems. b = {0.732050808, -2.732050808}

Solution

b = {0.732050808, -2.732050808}

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