(x*x)+(15*15)=(28*28)

Solution for (x*x)+(15*15)=(28*28) equation:

Simplifying
(x * x) + (15 * 15) = (28 * 28)

Multiply x * x
(x2) + (15 * 15) = (28 * 28)
x2 + (15 * 15) = (28 * 28)

Multiply 15 * 15
x2 + (225) = (28 * 28)
x2 + 225 = (28 * 28)

Reorder the terms:
225 + x2 = (28 * 28)

Multiply 28 * 28
225 + x2 = (784)
225 + x2 = 784

Solving
225 + x2 = 784

Solving for variable 'x'.

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

Add '-225' to each side of the equation.
225 + -225 + x2 = 784 + -225

Combine like terms: 225 + -225 = 0
0 + x2 = 784 + -225
x2 = 784 + -225

Combine like terms: 784 + -225 = 559
x2 = 559

Simplifying
x2 = 559

Take the square root of each side:
x = {-23.643180835, 23.643180835}