1. (5x + 7) (3x +4)
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Answer:
15x² + 41x + 28
Step-by-step explanation:
=> (5x + 7)(3x + 4)
=> 5x(3x + 4) +7(3x + 4)
=> 15x² + 20x + 21x + 28
=> 15x² + 41x + 28
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