X^2=16+((X-4)*(X+4))

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Solution for X^2=16+((X-4)*(X+4)) equation: 


Simplifying
X2 = 16 + ((X + -4)(X + 4))

Reorder the terms:
X2 = 16 + ((-4 + X)(X + 4))

Reorder the terms:
X2 = 16 + ((-4 + X)(4 + X))

Multiply (-4 + X) * (4 + X)
X2 = 16 + ((-4(4 + X) + X(4 + X)))
X2 = 16 + (((4 * -4 + X * -4) + X(4 + X)))
X2 = 16 + (((-16 + -4X) + X(4 + X)))
X2 = 16 + ((-16 + -4X + (4 * X + X * X)))
X2 = 16 + ((-16 + -4X + (4X + X2)))

Combine like terms: -4X + 4X = 0
X2 = 16 + ((-16 + 0 + X2))
X2 = 16 + ((-16 + X2))
X2 = 16 + (-16 + X2)

Remove parenthesis around (-16 + X2)
X2 = 16 + -16 + X2

Combine like terms: 16 + -16 = 0
X2 = 0 + X2
X2 = X2

Add '-1X2' to each side of the equation.
X2 + -1X2 = X2 + -1X2

Combine like terms: X2 + -1X2 = 0
0 = X2 + -1X2

Combine like terms: X2 + -1X2 = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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