5b^2+3b-26=-6

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Solution for 5b^2+3b-26=-6 equation:


Simplifying
5b2 + 3b + -26 = -6

Reorder the terms:
-26 + 3b + 5b2 = -6

Solving
-26 + 3b + 5b2 = -6

Solving for variable 'b'.

Reorder the terms:
-26 + 6 + 3b + 5b2 = -6 + 6

Combine like terms: -26 + 6 = -20
-20 + 3b + 5b2 = -6 + 6

Combine like terms: -6 + 6 = 0
-20 + 3b + 5b2 = 0

Begin completing the square.  Divide all terms by
5 the coefficient of the squared term: 

Divide each side by '5'.
-4 + 0.6b + b2 = 0

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + 0.6b + 4 + b2 = 0 + 4

Reorder the terms:
-4 + 4 + 0.6b + b2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + 0.6b + b2 = 0 + 4
0.6b + b2 = 0 + 4

Combine like terms: 0 + 4 = 4
0.6b + b2 = 4

The b term is 0.6b.  Take half its coefficient (0.3).
Square it (0.09) and add it to both sides.

Add '0.09' to each side of the equation.
0.6b + 0.09 + b2 = 4 + 0.09

Reorder the terms:
0.09 + 0.6b + b2 = 4 + 0.09

Combine like terms: 4 + 0.09 = 4.09
0.09 + 0.6b + b2 = 4.09

Factor a perfect square on the left side:
(b + 0.3)(b + 0.3) = 4.09

Calculate the square root of the right side: 2.022374842

Break this problem into two subproblems by setting 
(b + 0.3) equal to 2.022374842 and -2.022374842.

Subproblem 1

b + 0.3 = 2.022374842 Simplifying b + 0.3 = 2.022374842 Reorder the terms: 0.3 + b = 2.022374842 Solving 0.3 + b = 2.022374842 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-0.3' to each side of the equation. 0.3 + -0.3 + b = 2.022374842 + -0.3 Combine like terms: 0.3 + -0.3 = 0.0 0.0 + b = 2.022374842 + -0.3 b = 2.022374842 + -0.3 Combine like terms: 2.022374842 + -0.3 = 1.722374842 b = 1.722374842 Simplifying b = 1.722374842

Subproblem 2

b + 0.3 = -2.022374842 Simplifying b + 0.3 = -2.022374842 Reorder the terms: 0.3 + b = -2.022374842 Solving 0.3 + b = -2.022374842 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-0.3' to each side of the equation. 0.3 + -0.3 + b = -2.022374842 + -0.3 Combine like terms: 0.3 + -0.3 = 0.0 0.0 + b = -2.022374842 + -0.3 b = -2.022374842 + -0.3 Combine like terms: -2.022374842 + -0.3 = -2.322374842 b = -2.322374842 Simplifying b = -2.322374842

Solution

The solution to the problem is based on the solutions from the subproblems. b = {1.722374842, -2.322374842}

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