-5B^2+51B=15

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Solution for -5B^2+51B=15 equation:


Simplifying
-5B2 + 51B = 15

Reorder the terms:
51B + -5B2 = 15

Solving
51B + -5B2 = 15

Solving for variable 'B'.

Reorder the terms:
-15 + 51B + -5B2 = 15 + -15

Combine like terms: 15 + -15 = 0
-15 + 51B + -5B2 = 0

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

Divide each side by '-5'.
3 + -10.2B + B2 = 0

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + -10.2B + -3 + B2 = 0 + -3

Reorder the terms:
3 + -3 + -10.2B + B2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -10.2B + B2 = 0 + -3
-10.2B + B2 = 0 + -3

Combine like terms: 0 + -3 = -3
-10.2B + B2 = -3

The B term is -10.2B.  Take half its coefficient (-5.1).
Square it (26.01) and add it to both sides.

Add '26.01' to each side of the equation.
-10.2B + 26.01 + B2 = -3 + 26.01

Reorder the terms:
26.01 + -10.2B + B2 = -3 + 26.01

Combine like terms: -3 + 26.01 = 23.01
26.01 + -10.2B + B2 = 23.01

Factor a perfect square on the left side:
(B + -5.1)(B + -5.1) = 23.01

Calculate the square root of the right side: 4.796873982

Break this problem into two subproblems by setting 
(B + -5.1) equal to 4.796873982 and -4.796873982.

Subproblem 1

B + -5.1 = 4.796873982 Simplifying B + -5.1 = 4.796873982 Reorder the terms: -5.1 + B = 4.796873982 Solving -5.1 + B = 4.796873982 Solving for variable 'B'. Move all terms containing B to the left, all other terms to the right. Add '5.1' to each side of the equation. -5.1 + 5.1 + B = 4.796873982 + 5.1 Combine like terms: -5.1 + 5.1 = 0.0 0.0 + B = 4.796873982 + 5.1 B = 4.796873982 + 5.1 Combine like terms: 4.796873982 + 5.1 = 9.896873982 B = 9.896873982 Simplifying B = 9.896873982

Subproblem 2

B + -5.1 = -4.796873982 Simplifying B + -5.1 = -4.796873982 Reorder the terms: -5.1 + B = -4.796873982 Solving -5.1 + B = -4.796873982 Solving for variable 'B'. Move all terms containing B to the left, all other terms to the right. Add '5.1' to each side of the equation. -5.1 + 5.1 + B = -4.796873982 + 5.1 Combine like terms: -5.1 + 5.1 = 0.0 0.0 + B = -4.796873982 + 5.1 B = -4.796873982 + 5.1 Combine like terms: -4.796873982 + 5.1 = 0.303126018 B = 0.303126018 Simplifying B = 0.303126018

Solution

The solution to the problem is based on the solutions from the subproblems. B = {9.896873982, 0.303126018}

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