(5b^2+8b-1)-(-2b^2-8)=

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Solution for (5b^2+8b-1)-(-2b^2-8)= equation:


Simplifying
(5b2 + 8b + -1) + -1(-2b2 + -8) = 0

Reorder the terms:
(-1 + 8b + 5b2) + -1(-2b2 + -8) = 0

Remove parenthesis around (-1 + 8b + 5b2)
-1 + 8b + 5b2 + -1(-2b2 + -8) = 0

Reorder the terms:
-1 + 8b + 5b2 + -1(-8 + -2b2) = 0
-1 + 8b + 5b2 + (-8 * -1 + -2b2 * -1) = 0
-1 + 8b + 5b2 + (8 + 2b2) = 0

Reorder the terms:
-1 + 8 + 8b + 5b2 + 2b2 = 0

Combine like terms: -1 + 8 = 7
7 + 8b + 5b2 + 2b2 = 0

Combine like terms: 5b2 + 2b2 = 7b2
7 + 8b + 7b2 = 0

Solving
7 + 8b + 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'.
1 + 1.142857143b + b2 = 0

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + 1.142857143b + -1 + b2 = 0 + -1

Reorder the terms:
1 + -1 + 1.142857143b + b2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + 1.142857143b + b2 = 0 + -1
1.142857143b + b2 = 0 + -1

Combine like terms: 0 + -1 = -1
1.142857143b + b2 = -1

The b term is 1.142857143b.  Take half its coefficient (0.5714285715).
Square it (0.3265306123) and add it to both sides.

Add '0.3265306123' to each side of the equation.
1.142857143b + 0.3265306123 + b2 = -1 + 0.3265306123

Reorder the terms:
0.3265306123 + 1.142857143b + b2 = -1 + 0.3265306123

Combine like terms: -1 + 0.3265306123 = -0.6734693877
0.3265306123 + 1.142857143b + b2 = -0.6734693877

Factor a perfect square on the left side:
(b + 0.5714285715)(b + 0.5714285715) = -0.6734693877

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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