b^2=7b-18

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Solution for b^2=7b-18 equation:


Simplifying
b2 = 7b + -18

Reorder the terms:
b2 = -18 + 7b

Solving
b2 = -18 + 7b

Solving for variable 'b'.

Reorder the terms:
18 + -7b + b2 = -18 + 7b + 18 + -7b

Reorder the terms:
18 + -7b + b2 = -18 + 18 + 7b + -7b

Combine like terms: -18 + 18 = 0
18 + -7b + b2 = 0 + 7b + -7b
18 + -7b + b2 = 7b + -7b

Combine like terms: 7b + -7b = 0
18 + -7b + b2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-18' to each side of the equation.
18 + -7b + -18 + b2 = 0 + -18

Reorder the terms:
18 + -18 + -7b + b2 = 0 + -18

Combine like terms: 18 + -18 = 0
0 + -7b + b2 = 0 + -18
-7b + b2 = 0 + -18

Combine like terms: 0 + -18 = -18
-7b + b2 = -18

The b term is -7b.  Take half its coefficient (-3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
-7b + 12.25 + b2 = -18 + 12.25

Reorder the terms:
12.25 + -7b + b2 = -18 + 12.25

Combine like terms: -18 + 12.25 = -5.75
12.25 + -7b + b2 = -5.75

Factor a perfect square on the left side:
(b + -3.5)(b + -3.5) = -5.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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