-9(B^2+2B)-3+B(2B+5)+7=

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Solution for -9(B^2+2B)-3+B(2B+5)+7= equation:


Simplifying
-9(B2 + 2B) + -3 + B(2B + 5) + 7 = 0

Reorder the terms:
-9(2B + B2) + -3 + B(2B + 5) + 7 = 0
(2B * -9 + B2 * -9) + -3 + B(2B + 5) + 7 = 0
(-18B + -9B2) + -3 + B(2B + 5) + 7 = 0

Reorder the terms:
-18B + -9B2 + -3 + B(5 + 2B) + 7 = 0
-18B + -9B2 + -3 + (5 * B + 2B * B) + 7 = 0
-18B + -9B2 + -3 + (5B + 2B2) + 7 = 0

Reorder the terms:
-3 + 7 + -18B + 5B + -9B2 + 2B2 = 0

Combine like terms: -3 + 7 = 4
4 + -18B + 5B + -9B2 + 2B2 = 0

Combine like terms: -18B + 5B = -13B
4 + -13B + -9B2 + 2B2 = 0

Combine like terms: -9B2 + 2B2 = -7B2
4 + -13B + -7B2 = 0

Solving
4 + -13B + -7B2 = 0

Solving for variable 'B'.

Begin completing the square.  Divide all terms by
-7 the coefficient of the squared term: 

Divide each side by '-7'.
-0.5714285714 + 1.857142857B + B2 = 0

Move the constant term to the right:

Add '0.5714285714' to each side of the equation.
-0.5714285714 + 1.857142857B + 0.5714285714 + B2 = 0 + 0.5714285714

Reorder the terms:
-0.5714285714 + 0.5714285714 + 1.857142857B + B2 = 0 + 0.5714285714

Combine like terms: -0.5714285714 + 0.5714285714 = 0.0000000000
0.0000000000 + 1.857142857B + B2 = 0 + 0.5714285714
1.857142857B + B2 = 0 + 0.5714285714

Combine like terms: 0 + 0.5714285714 = 0.5714285714
1.857142857B + B2 = 0.5714285714

The B term is 1.857142857B.  Take half its coefficient (0.9285714285).
Square it (0.8622448978) and add it to both sides.

Add '0.8622448978' to each side of the equation.
1.857142857B + 0.8622448978 + B2 = 0.5714285714 + 0.8622448978

Reorder the terms:
0.8622448978 + 1.857142857B + B2 = 0.5714285714 + 0.8622448978

Combine like terms: 0.5714285714 + 0.8622448978 = 1.4336734692
0.8622448978 + 1.857142857B + B2 = 1.4336734692

Factor a perfect square on the left side:
(B + 0.9285714285)(B + 0.9285714285) = 1.4336734692

Calculate the square root of the right side: 1.197361044

Break this problem into two subproblems by setting 
(B + 0.9285714285) equal to 1.197361044 and -1.197361044.

Subproblem 1

B + 0.9285714285 = 1.197361044 Simplifying B + 0.9285714285 = 1.197361044 Reorder the terms: 0.9285714285 + B = 1.197361044 Solving 0.9285714285 + B = 1.197361044 Solving for variable 'B'. Move all terms containing B to the left, all other terms to the right. Add '-0.9285714285' to each side of the equation. 0.9285714285 + -0.9285714285 + B = 1.197361044 + -0.9285714285 Combine like terms: 0.9285714285 + -0.9285714285 = 0.0000000000 0.0000000000 + B = 1.197361044 + -0.9285714285 B = 1.197361044 + -0.9285714285 Combine like terms: 1.197361044 + -0.9285714285 = 0.2687896155 B = 0.2687896155 Simplifying B = 0.2687896155

Subproblem 2

B + 0.9285714285 = -1.197361044 Simplifying B + 0.9285714285 = -1.197361044 Reorder the terms: 0.9285714285 + B = -1.197361044 Solving 0.9285714285 + B = -1.197361044 Solving for variable 'B'. Move all terms containing B to the left, all other terms to the right. Add '-0.9285714285' to each side of the equation. 0.9285714285 + -0.9285714285 + B = -1.197361044 + -0.9285714285 Combine like terms: 0.9285714285 + -0.9285714285 = 0.0000000000 0.0000000000 + B = -1.197361044 + -0.9285714285 B = -1.197361044 + -0.9285714285 Combine like terms: -1.197361044 + -0.9285714285 = -2.1259324725 B = -2.1259324725 Simplifying B = -2.1259324725

Solution

The solution to the problem is based on the solutions from the subproblems. B = {0.2687896155, -2.1259324725}

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