4b^2+8b+7=-4

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Solution for 4b^2+8b+7=-4 equation:


Simplifying
4b2 + 8b + 7 = -4

Reorder the terms:
7 + 8b + 4b2 = -4

Solving
7 + 8b + 4b2 = -4

Solving for variable 'b'.

Reorder the terms:
7 + 4 + 8b + 4b2 = -4 + 4

Combine like terms: 7 + 4 = 11
11 + 8b + 4b2 = -4 + 4

Combine like terms: -4 + 4 = 0
11 + 8b + 4b2 = 0

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

Divide each side by '4'.
2.75 + 2b + b2 = 0

Move the constant term to the right:

Add '-2.75' to each side of the equation.
2.75 + 2b + -2.75 + b2 = 0 + -2.75

Reorder the terms:
2.75 + -2.75 + 2b + b2 = 0 + -2.75

Combine like terms: 2.75 + -2.75 = 0.00
0.00 + 2b + b2 = 0 + -2.75
2b + b2 = 0 + -2.75

Combine like terms: 0 + -2.75 = -2.75
2b + b2 = -2.75

The b term is 2b.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2b + 1 + b2 = -2.75 + 1

Reorder the terms:
1 + 2b + b2 = -2.75 + 1

Combine like terms: -2.75 + 1 = -1.75
1 + 2b + b2 = -1.75

Factor a perfect square on the left side:
(b + 1)(b + 1) = -1.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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