((a)(a))+((17)(17))=((20)(20))

Solution for ((a)(a))+((17)(17))=((20)(20)) equation:

Simplifying
((a)(a)) + ((17)(17)) = ((20)(20))

Multiply a * a
(a2) + ((17)(17)) = ((20)(20))
a2 + ((17)(17)) = ((20)(20))

Multiply 17 * 17
a2 + (289) = ((20)(20))
a2 + 289 = ((20)(20))

Reorder the terms:
289 + a2 = ((20)(20))

Multiply 20 * 20
289 + a2 = (400)
289 + a2 = 400

Solving
289 + a2 = 400

Solving for variable 'a'.

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

Add '-289' to each side of the equation.
289 + -289 + a2 = 400 + -289

Combine like terms: 289 + -289 = 0
0 + a2 = 400 + -289
a2 = 400 + -289

Combine like terms: 400 + -289 = 111
a2 = 111

Simplifying
a2 = 111

Take the square root of each side:
a = {-10.535653753, 10.535653753}