B^2+7=B+17

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Solution for B^2+7=B+17 equation:


Simplifying
B2 + 7 = B + 17

Reorder the terms:
7 + B2 = B + 17

Reorder the terms:
7 + B2 = 17 + B

Solving
7 + B2 = 17 + B

Solving for variable 'B'.

Reorder the terms:
7 + -17 + -1B + B2 = 17 + B + -17 + -1B

Combine like terms: 7 + -17 = -10
-10 + -1B + B2 = 17 + B + -17 + -1B

Reorder the terms:
-10 + -1B + B2 = 17 + -17 + B + -1B

Combine like terms: 17 + -17 = 0
-10 + -1B + B2 = 0 + B + -1B
-10 + -1B + B2 = B + -1B

Combine like terms: B + -1B = 0
-10 + -1B + B2 = 0

Begin completing the square.

Move the constant term to the right:

Add '10' to each side of the equation.
-10 + -1B + 10 + B2 = 0 + 10

Reorder the terms:
-10 + 10 + -1B + B2 = 0 + 10

Combine like terms: -10 + 10 = 0
0 + -1B + B2 = 0 + 10
-1B + B2 = 0 + 10

Combine like terms: 0 + 10 = 10
-1B + B2 = 10

The B term is -1B.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1B + 0.25 + B2 = 10 + 0.25

Reorder the terms:
0.25 + -1B + B2 = 10 + 0.25

Combine like terms: 10 + 0.25 = 10.25
0.25 + -1B + B2 = 10.25

Factor a perfect square on the left side:
(B + -0.5)(B + -0.5) = 10.25

Calculate the square root of the right side: 3.201562119

Break this problem into two subproblems by setting 
(B + -0.5) equal to 3.201562119 and -3.201562119.

Subproblem 1

B + -0.5 = 3.201562119 Simplifying B + -0.5 = 3.201562119 Reorder the terms: -0.5 + B = 3.201562119 Solving -0.5 + B = 3.201562119 Solving for variable 'B'. Move all terms containing B to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + B = 3.201562119 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + B = 3.201562119 + 0.5 B = 3.201562119 + 0.5 Combine like terms: 3.201562119 + 0.5 = 3.701562119 B = 3.701562119 Simplifying B = 3.701562119

Subproblem 2

B + -0.5 = -3.201562119 Simplifying B + -0.5 = -3.201562119 Reorder the terms: -0.5 + B = -3.201562119 Solving -0.5 + B = -3.201562119 Solving for variable 'B'. Move all terms containing B to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + B = -3.201562119 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + B = -3.201562119 + 0.5 B = -3.201562119 + 0.5 Combine like terms: -3.201562119 + 0.5 = -2.701562119 B = -2.701562119 Simplifying B = -2.701562119

Solution

The solution to the problem is based on the solutions from the subproblems. B = {3.701562119, -2.701562119}

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