(b+5)(b-7)=(b-5)(b+7)

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Solution for (b+5)(b-7)=(b-5)(b+7) equation:


Simplifying
(b + 5)(b + -7) = (b + -5)(b + 7)

Reorder the terms:
(5 + b)(b + -7) = (b + -5)(b + 7)

Reorder the terms:
(5 + b)(-7 + b) = (b + -5)(b + 7)

Multiply (5 + b) * (-7 + b)
(5(-7 + b) + b(-7 + b)) = (b + -5)(b + 7)
((-7 * 5 + b * 5) + b(-7 + b)) = (b + -5)(b + 7)
((-35 + 5b) + b(-7 + b)) = (b + -5)(b + 7)
(-35 + 5b + (-7 * b + b * b)) = (b + -5)(b + 7)
(-35 + 5b + (-7b + b2)) = (b + -5)(b + 7)

Combine like terms: 5b + -7b = -2b
(-35 + -2b + b2) = (b + -5)(b + 7)

Reorder the terms:
-35 + -2b + b2 = (-5 + b)(b + 7)

Reorder the terms:
-35 + -2b + b2 = (-5 + b)(7 + b)

Multiply (-5 + b) * (7 + b)
-35 + -2b + b2 = (-5(7 + b) + b(7 + b))
-35 + -2b + b2 = ((7 * -5 + b * -5) + b(7 + b))
-35 + -2b + b2 = ((-35 + -5b) + b(7 + b))
-35 + -2b + b2 = (-35 + -5b + (7 * b + b * b))
-35 + -2b + b2 = (-35 + -5b + (7b + b2))

Combine like terms: -5b + 7b = 2b
-35 + -2b + b2 = (-35 + 2b + b2)

Add '35' to each side of the equation.
-35 + -2b + 35 + b2 = -35 + 2b + 35 + b2

Reorder the terms:
-35 + 35 + -2b + b2 = -35 + 2b + 35 + b2

Combine like terms: -35 + 35 = 0
0 + -2b + b2 = -35 + 2b + 35 + b2
-2b + b2 = -35 + 2b + 35 + b2

Reorder the terms:
-2b + b2 = -35 + 35 + 2b + b2

Combine like terms: -35 + 35 = 0
-2b + b2 = 0 + 2b + b2
-2b + b2 = 2b + b2

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

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

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

Solving
-2b = 2b

Solving for variable 'b'.

Move all terms containing b to the left, all other terms to the right.

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

Combine like terms: -2b + -2b = -4b
-4b = 2b + -2b

Combine like terms: 2b + -2b = 0
-4b = 0

Divide each side by '-4'.
b = 0

Simplifying
b = 0

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