((7)(7))+((b)(b))=(20)(20)

Solution for ((7)(7))+((b)(b))=(20)(20) equation:

Simplifying
((7)(7)) + ((b)(b)) = (20)(20)

Multiply 7 * 7
(49) + ((b)(b)) = (20)(20)
49 + ((b)(b)) = (20)(20)

Multiply b * b
49 + (b2) = (20)(20)
49 + b2 = (20)(20)

Multiply 20 * 20
49 + b2 = 400

Solving
49 + b2 = 400

Solving for variable 'b'.

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

Add '-49' to each side of the equation.
49 + -49 + b2 = 400 + -49

Combine like terms: 49 + -49 = 0
0 + b2 = 400 + -49
b2 = 400 + -49

Combine like terms: 400 + -49 = 351
b2 = 351

Simplifying
b2 = 351

Take the square root of each side:
b = {-18.734993995, 18.734993995}