10b^2=-8b-7

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Solution for 10b^2=-8b-7 equation:


Simplifying
10b2 = -8b + -7

Reorder the terms:
10b2 = -7 + -8b

Solving
10b2 = -7 + -8b

Solving for variable 'b'.

Reorder the terms:
7 + 8b + 10b2 = -7 + -8b + 7 + 8b

Reorder the terms:
7 + 8b + 10b2 = -7 + 7 + -8b + 8b

Combine like terms: -7 + 7 = 0
7 + 8b + 10b2 = 0 + -8b + 8b
7 + 8b + 10b2 = -8b + 8b

Combine like terms: -8b + 8b = 0
7 + 8b + 10b2 = 0

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

Divide each side by '10'.
0.7 + 0.8b + b2 = 0

Move the constant term to the right:

Add '-0.7' to each side of the equation.
0.7 + 0.8b + -0.7 + b2 = 0 + -0.7

Reorder the terms:
0.7 + -0.7 + 0.8b + b2 = 0 + -0.7

Combine like terms: 0.7 + -0.7 = 0.0
0.0 + 0.8b + b2 = 0 + -0.7
0.8b + b2 = 0 + -0.7

Combine like terms: 0 + -0.7 = -0.7
0.8b + b2 = -0.7

The b term is 0.8b.  Take half its coefficient (0.4).
Square it (0.16) and add it to both sides.

Add '0.16' to each side of the equation.
0.8b + 0.16 + b2 = -0.7 + 0.16

Reorder the terms:
0.16 + 0.8b + b2 = -0.7 + 0.16

Combine like terms: -0.7 + 0.16 = -0.54
0.16 + 0.8b + b2 = -0.54

Factor a perfect square on the left side:
(b + 0.4)(b + 0.4) = -0.54

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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