y=(x-4)(x+4)

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Solution for y=(x-4)(x+4) equation: 


Simplifying
y = (x + -4)(x + 4)

Reorder the terms:
y = (-4 + x)(x + 4)

Reorder the terms:
y = (-4 + x)(4 + x)

Multiply (-4 + x) * (4 + x)
y = (-4(4 + x) + x(4 + x))
y = ((4 * -4 + x * -4) + x(4 + x))
y = ((-16 + -4x) + x(4 + x))
y = (-16 + -4x + (4 * x + x * x))
y = (-16 + -4x + (4x + x2))

Combine like terms: -4x + 4x = 0
y = (-16 + 0 + x2)
y = (-16 + x2)

Solving
y = -16 + x2

Solving for variable 'y'.

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

Simplifying
y = -16 + x2

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