(b) Find the value of ? in factored form: 4. [3/ (x - 4)] = [((3x + 36) / ?] 5. [4/ (2x + 5)] = [? / (2x? – x – 15)] 6. [(x + 2) / (3x + 2)] = [(3x² + 4x – 4)/ ?]

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