(7b-3)(7b+3)=

Solution for (7b-3)(7b+3)= equation:

Simplifying
(7b + -3)(7b + 3) = 0

Reorder the terms:
(-3 + 7b)(7b + 3) = 0

Reorder the terms:
(-3 + 7b)(3 + 7b) = 0

Multiply (-3 + 7b) * (3 + 7b)
(-3(3 + 7b) + 7b * (3 + 7b)) = 0
((3 * -3 + 7b * -3) + 7b * (3 + 7b)) = 0
((-9 + -21b) + 7b * (3 + 7b)) = 0
(-9 + -21b + (3 * 7b + 7b * 7b)) = 0
(-9 + -21b + (21b + 49b2)) = 0

Combine like terms: -21b + 21b = 0
(-9 + 0 + 49b2) = 0
(-9 + 49b2) = 0

Solving
-9 + 49b2 = 0

Solving for variable 'b'.

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

Add '9' to each side of the equation.
-9 + 9 + 49b2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + 49b2 = 0 + 9
49b2 = 0 + 9

Combine like terms: 0 + 9 = 9
49b2 = 9

Divide each side by '49'.
b2 = 0.1836734694

Simplifying
b2 = 0.1836734694

Take the square root of each side:
b = {-0.428571429, 0.428571429}