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

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

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

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

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

Multiply (3b + 7m) * (-3b + 7m)
(3b * (-3b + 7m) + 7m * (-3b + 7m)) = 0
((-3b * 3b + 7m * 3b) + 7m * (-3b + 7m)) = 0

Reorder the terms:
((21bm + -9b2) + 7m * (-3b + 7m)) = 0
((21bm + -9b2) + 7m * (-3b + 7m)) = 0
(21bm + -9b2 + (-3b * 7m + 7m * 7m)) = 0
(21bm + -9b2 + (-21bm + 49m2)) = 0

Reorder the terms:
(21bm + -21bm + -9b2 + 49m2) = 0

Combine like terms: 21bm + -21bm = 0
(0 + -9b2 + 49m2) = 0
(-9b2 + 49m2) = 0

Solving
-9b2 + 49m2 = 0

Solving for variable 'b'.

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

Add '-49m2' to each side of the equation.
-9b2 + 49m2 + -49m2 = 0 + -49m2

Combine like terms: 49m2 + -49m2 = 0
-9b2 + 0 = 0 + -49m2
-9b2 = 0 + -49m2
Remove the zero:
-9b2 = -49m2

Divide each side by '-9'.
b2 = 5.444444444m2

Simplifying
b2 = 5.444444444m2

Take the square root of each side:
b = {-2.333333333m, 2.333333333m}