(10b+4)(10b-4)=

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Solution for (10b+4)(10b-4)= equation: 


Simplifying
(10b + 4)(10b + -4) = 0

Reorder the terms:
(4 + 10b)(10b + -4) = 0

Reorder the terms:
(4 + 10b)(-4 + 10b) = 0

Multiply (4 + 10b) * (-4 + 10b)
(4(-4 + 10b) + 10b * (-4 + 10b)) = 0
((-4 * 4 + 10b * 4) + 10b * (-4 + 10b)) = 0
((-16 + 40b) + 10b * (-4 + 10b)) = 0
(-16 + 40b + (-4 * 10b + 10b * 10b)) = 0
(-16 + 40b + (-40b + 100b2)) = 0

Combine like terms: 40b + -40b = 0
(-16 + 0 + 100b2) = 0
(-16 + 100b2) = 0

Solving
-16 + 100b2 = 0

Solving for variable 'b'.

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

Add '16' to each side of the equation.
-16 + 16 + 100b2 = 0 + 16

Combine like terms: -16 + 16 = 0
0 + 100b2 = 0 + 16
100b2 = 0 + 16

Combine like terms: 0 + 16 = 16
100b2 = 16

Divide each side by '100'.
b2 = 0.16

Simplifying
b2 = 0.16

Take the square root of each side:
b = {-0.4, 0.4}

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