5b^2=10+3b

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Solution for 5b^2=10+3b equation:


Simplifying
5b2 = 10 + 3b

Solving
5b2 = 10 + 3b

Solving for variable 'b'.

Reorder the terms:
-10 + -3b + 5b2 = 10 + 3b + -10 + -3b

Reorder the terms:
-10 + -3b + 5b2 = 10 + -10 + 3b + -3b

Combine like terms: 10 + -10 = 0
-10 + -3b + 5b2 = 0 + 3b + -3b
-10 + -3b + 5b2 = 3b + -3b

Combine like terms: 3b + -3b = 0
-10 + -3b + 5b2 = 0

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

Divide each side by '5'.
-2 + -0.6b + b2 = 0

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + -0.6b + 2 + b2 = 0 + 2

Reorder the terms:
-2 + 2 + -0.6b + b2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -0.6b + b2 = 0 + 2
-0.6b + b2 = 0 + 2

Combine like terms: 0 + 2 = 2
-0.6b + b2 = 2

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 = 2 + 0.09

Reorder the terms:
0.09 + -0.6b + b2 = 2 + 0.09

Combine like terms: 2 + 0.09 = 2.09
0.09 + -0.6b + b2 = 2.09

Factor a perfect square on the left side:
(b + -0.3)(b + -0.3) = 2.09

Calculate the square root of the right side: 1.445683229

Break this problem into two subproblems by setting 
(b + -0.3) equal to 1.445683229 and -1.445683229.

Subproblem 1

b + -0.3 = 1.445683229 Simplifying b + -0.3 = 1.445683229 Reorder the terms: -0.3 + b = 1.445683229 Solving -0.3 + b = 1.445683229 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 = 1.445683229 + 0.3 Combine like terms: -0.3 + 0.3 = 0.0 0.0 + b = 1.445683229 + 0.3 b = 1.445683229 + 0.3 Combine like terms: 1.445683229 + 0.3 = 1.745683229 b = 1.745683229 Simplifying b = 1.745683229

Subproblem 2

b + -0.3 = -1.445683229 Simplifying b + -0.3 = -1.445683229 Reorder the terms: -0.3 + b = -1.445683229 Solving -0.3 + b = -1.445683229 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 = -1.445683229 + 0.3 Combine like terms: -0.3 + 0.3 = 0.0 0.0 + b = -1.445683229 + 0.3 b = -1.445683229 + 0.3 Combine like terms: -1.445683229 + 0.3 = -1.145683229 b = -1.145683229 Simplifying b = -1.145683229

Solution

The solution to the problem is based on the solutions from the subproblems. b = {1.745683229, -1.145683229}

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