b^2+5b-35=3

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Solution for b^2+5b-35=3 equation:


Simplifying
b2 + 5b + -35 = 3

Reorder the terms:
-35 + 5b + b2 = 3

Solving
-35 + 5b + b2 = 3

Solving for variable 'b'.

Reorder the terms:
-35 + -3 + 5b + b2 = 3 + -3

Combine like terms: -35 + -3 = -38
-38 + 5b + b2 = 3 + -3

Combine like terms: 3 + -3 = 0
-38 + 5b + b2 = 0

Begin completing the square.

Move the constant term to the right:

Add '38' to each side of the equation.
-38 + 5b + 38 + b2 = 0 + 38

Reorder the terms:
-38 + 38 + 5b + b2 = 0 + 38

Combine like terms: -38 + 38 = 0
0 + 5b + b2 = 0 + 38
5b + b2 = 0 + 38

Combine like terms: 0 + 38 = 38
5b + b2 = 38

The b term is 5b.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5b + 6.25 + b2 = 38 + 6.25

Reorder the terms:
6.25 + 5b + b2 = 38 + 6.25

Combine like terms: 38 + 6.25 = 44.25
6.25 + 5b + b2 = 44.25

Factor a perfect square on the left side:
(b + 2.5)(b + 2.5) = 44.25

Calculate the square root of the right side: 6.652067348

Break this problem into two subproblems by setting 
(b + 2.5) equal to 6.652067348 and -6.652067348.

Subproblem 1

b + 2.5 = 6.652067348 Simplifying b + 2.5 = 6.652067348 Reorder the terms: 2.5 + b = 6.652067348 Solving 2.5 + b = 6.652067348 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + b = 6.652067348 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + b = 6.652067348 + -2.5 b = 6.652067348 + -2.5 Combine like terms: 6.652067348 + -2.5 = 4.152067348 b = 4.152067348 Simplifying b = 4.152067348

Subproblem 2

b + 2.5 = -6.652067348 Simplifying b + 2.5 = -6.652067348 Reorder the terms: 2.5 + b = -6.652067348 Solving 2.5 + b = -6.652067348 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + b = -6.652067348 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + b = -6.652067348 + -2.5 b = -6.652067348 + -2.5 Combine like terms: -6.652067348 + -2.5 = -9.152067348 b = -9.152067348 Simplifying b = -9.152067348

Solution

The solution to the problem is based on the solutions from the subproblems. b = {4.152067348, -9.152067348}

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