11.2b-b^2=10

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Solution for 11.2b-b^2=10 equation:


Simplifying
11.2b + -1b2 = 10

Solving
11.2b + -1b2 = 10

Solving for variable 'b'.

Reorder the terms:
-10 + 11.2b + -1b2 = 10 + -10

Combine like terms: 10 + -10 = 0
-10 + 11.2b + -1b2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
10 + -11.2b + b2 = 0

Move the constant term to the right:

Add '-10' to each side of the equation.
10 + -11.2b + -10 + b2 = 0 + -10

Reorder the terms:
10 + -10 + -11.2b + b2 = 0 + -10

Combine like terms: 10 + -10 = 0
0 + -11.2b + b2 = 0 + -10
-11.2b + b2 = 0 + -10

Combine like terms: 0 + -10 = -10
-11.2b + b2 = -10

The b term is -11.2b.  Take half its coefficient (-5.6).
Square it (31.36) and add it to both sides.

Add '31.36' to each side of the equation.
-11.2b + 31.36 + b2 = -10 + 31.36

Reorder the terms:
31.36 + -11.2b + b2 = -10 + 31.36

Combine like terms: -10 + 31.36 = 21.36
31.36 + -11.2b + b2 = 21.36

Factor a perfect square on the left side:
(b + -5.6)(b + -5.6) = 21.36

Calculate the square root of the right side: 4.621688003

Break this problem into two subproblems by setting 
(b + -5.6) equal to 4.621688003 and -4.621688003.

Subproblem 1

b + -5.6 = 4.621688003 Simplifying b + -5.6 = 4.621688003 Reorder the terms: -5.6 + b = 4.621688003 Solving -5.6 + b = 4.621688003 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '5.6' to each side of the equation. -5.6 + 5.6 + b = 4.621688003 + 5.6 Combine like terms: -5.6 + 5.6 = 0.0 0.0 + b = 4.621688003 + 5.6 b = 4.621688003 + 5.6 Combine like terms: 4.621688003 + 5.6 = 10.221688003 b = 10.221688003 Simplifying b = 10.221688003

Subproblem 2

b + -5.6 = -4.621688003 Simplifying b + -5.6 = -4.621688003 Reorder the terms: -5.6 + b = -4.621688003 Solving -5.6 + b = -4.621688003 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '5.6' to each side of the equation. -5.6 + 5.6 + b = -4.621688003 + 5.6 Combine like terms: -5.6 + 5.6 = 0.0 0.0 + b = -4.621688003 + 5.6 b = -4.621688003 + 5.6 Combine like terms: -4.621688003 + 5.6 = 0.978311997 b = 0.978311997 Simplifying b = 0.978311997

Solution

The solution to the problem is based on the solutions from the subproblems. b = {10.221688003, 0.978311997}

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