Divide 16x^4 – 81 by 2x – 3
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16x⁴ – 81 = (2x)⁴ - (3)⁴ = [ (2x)² ]² - [(3)²]² = [(2x)² + (3)²] [(2x)² - (3)²
= (4x² + 9)[(2x -3)(2x +3)]
16x⁴ – 81 = (4x² + 9)[(2x -3)(2x +3)] = (4x² + 9)(2x -3)
2x - 3 2x - 3
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