Evaluate: 3ab - (a + b) (if a = 4 and b = 5)

Evaluate: 3ab - (a + b) (if a = 4 and b = 5)
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3(4)(5)-(4+5) plug in values 60-4-5 distribute negative 51 Subtract from left to right and get your answer.
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3((4)5) -(4+5)
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