5(3b^2-2b)+10b^2-1=

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Solution for 5(3b^2-2b)+10b^2-1= equation:


Simplifying
5(3b2 + -2b) + 10b2 + -1 = 0

Reorder the terms:
5(-2b + 3b2) + 10b2 + -1 = 0
(-2b * 5 + 3b2 * 5) + 10b2 + -1 = 0
(-10b + 15b2) + 10b2 + -1 = 0

Reorder the terms:
-1 + -10b + 15b2 + 10b2 = 0

Combine like terms: 15b2 + 10b2 = 25b2
-1 + -10b + 25b2 = 0

Solving
-1 + -10b + 25b2 = 0

Solving for variable 'b'.

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

Divide each side by '25'.
-0.04 + -0.4b + b2 = 0

Move the constant term to the right:

Add '0.04' to each side of the equation.
-0.04 + -0.4b + 0.04 + b2 = 0 + 0.04

Reorder the terms:
-0.04 + 0.04 + -0.4b + b2 = 0 + 0.04

Combine like terms: -0.04 + 0.04 = 0.00
0.00 + -0.4b + b2 = 0 + 0.04
-0.4b + b2 = 0 + 0.04

Combine like terms: 0 + 0.04 = 0.04
-0.4b + b2 = 0.04

The b term is -0.4b.  Take half its coefficient (-0.2).
Square it (0.04) and add it to both sides.

Add '0.04' to each side of the equation.
-0.4b + 0.04 + b2 = 0.04 + 0.04

Reorder the terms:
0.04 + -0.4b + b2 = 0.04 + 0.04

Combine like terms: 0.04 + 0.04 = 0.08
0.04 + -0.4b + b2 = 0.08

Factor a perfect square on the left side:
(b + -0.2)(b + -0.2) = 0.08

Calculate the square root of the right side: 0.282842712

Break this problem into two subproblems by setting 
(b + -0.2) equal to 0.282842712 and -0.282842712.

Subproblem 1

b + -0.2 = 0.282842712 Simplifying b + -0.2 = 0.282842712 Reorder the terms: -0.2 + b = 0.282842712 Solving -0.2 + b = 0.282842712 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '0.2' to each side of the equation. -0.2 + 0.2 + b = 0.282842712 + 0.2 Combine like terms: -0.2 + 0.2 = 0.0 0.0 + b = 0.282842712 + 0.2 b = 0.282842712 + 0.2 Combine like terms: 0.282842712 + 0.2 = 0.482842712 b = 0.482842712 Simplifying b = 0.482842712

Subproblem 2

b + -0.2 = -0.282842712 Simplifying b + -0.2 = -0.282842712 Reorder the terms: -0.2 + b = -0.282842712 Solving -0.2 + b = -0.282842712 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '0.2' to each side of the equation. -0.2 + 0.2 + b = -0.282842712 + 0.2 Combine like terms: -0.2 + 0.2 = 0.0 0.0 + b = -0.282842712 + 0.2 b = -0.282842712 + 0.2 Combine like terms: -0.282842712 + 0.2 = -0.082842712 b = -0.082842712 Simplifying b = -0.082842712

Solution

The solution to the problem is based on the solutions from the subproblems. b = {0.482842712, -0.082842712}

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