Example

Factoring 16x224xy+9y26416x^2 - 24xy + 9y^2 - 64

Factor the polynomial 16x224xy+9y26416x^2 - 24xy + 9y^2 - 64 completely. Check for a greatest common factor. There is no overall GCF. Since there are 44 terms, group the first 33 terms together: (16x224xy+9y2)64(16x^2 - 24xy + 9y^2) - 64. Identify the grouped trinomial as a perfect square trinomial that fits the pattern a22ab+b2a^2 - 2ab + b^2 with a=4xa = 4x and b=3yb = 3y. Factor it into a squared binomial: (4x3y)264(4x - 3y)^2 - 64. The new expression is a difference of squares: (4x3y)282(4x - 3y)^2 - 8^2. Factor it as a product of conjugates: ((4x3y)8)((4x3y)+8)((4x - 3y) - 8)((4x - 3y) + 8). Simplify to yield the completely factored form: (4x3y8)(4x3y+8)(4x - 3y - 8)(4x - 3y + 8). Verify the factored form by multiplying.

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Updated 2026-04-30

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