2b^2+6b=16

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Solution for 2b^2+6b=16 equation:


Simplifying
2b2 + 6b = 16

Reorder the terms:
6b + 2b2 = 16

Solving
6b + 2b2 = 16

Solving for variable 'b'.

Reorder the terms:
-16 + 6b + 2b2 = 16 + -16

Combine like terms: 16 + -16 = 0
-16 + 6b + 2b2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-8 + 3b + b2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-8 + 3b + b2)' equal to zero and attempt to solve: Simplifying -8 + 3b + b2 = 0 Solving -8 + 3b + b2 = 0 Begin completing the square. Move the constant term to the right: Add '8' to each side of the equation. -8 + 3b + 8 + b2 = 0 + 8 Reorder the terms: -8 + 8 + 3b + b2 = 0 + 8 Combine like terms: -8 + 8 = 0 0 + 3b + b2 = 0 + 8 3b + b2 = 0 + 8 Combine like terms: 0 + 8 = 8 3b + b2 = 8 The b term is 3b. Take half its coefficient (1.5). Square it (2.25) and add it to both sides. Add '2.25' to each side of the equation. 3b + 2.25 + b2 = 8 + 2.25 Reorder the terms: 2.25 + 3b + b2 = 8 + 2.25 Combine like terms: 8 + 2.25 = 10.25 2.25 + 3b + b2 = 10.25 Factor a perfect square on the left side: (b + 1.5)(b + 1.5) = 10.25 Calculate the square root of the right side: 3.201562119 Break this problem into two subproblems by setting (b + 1.5) equal to 3.201562119 and -3.201562119.

Subproblem 1

b + 1.5 = 3.201562119 Simplifying b + 1.5 = 3.201562119 Reorder the terms: 1.5 + b = 3.201562119 Solving 1.5 + b = 3.201562119 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + b = 3.201562119 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + b = 3.201562119 + -1.5 b = 3.201562119 + -1.5 Combine like terms: 3.201562119 + -1.5 = 1.701562119 b = 1.701562119 Simplifying b = 1.701562119

Subproblem 2

b + 1.5 = -3.201562119 Simplifying b + 1.5 = -3.201562119 Reorder the terms: 1.5 + b = -3.201562119 Solving 1.5 + b = -3.201562119 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + b = -3.201562119 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + b = -3.201562119 + -1.5 b = -3.201562119 + -1.5 Combine like terms: -3.201562119 + -1.5 = -4.701562119 b = -4.701562119 Simplifying b = -4.701562119

Solution

The solution to the problem is based on the solutions from the subproblems. b = {1.701562119, -4.701562119}

Solution

b = {1.701562119, -4.701562119}

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