16x^2- 24xy+9y^2-16z^2
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16x² - 24xy + 9y² - 16z²
= (4x)² + (3y)² - 2 (4x) (3y) - 16z²
= (4x - 3y)² - (4z)²
= (4x - 3y + 4z) (4x - 3y - 4z)
Identities used:
A² + B² - 2AB = (A+B)²
A² - B² = (A+B) (A-B)
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