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Anonymous
Just replace x by 4 in the formula.
3(4) - 2 = 12-2 = 10.
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y = 3x + 2x^2 + k where k is any number
3x * (x - 4) = 3x*x - 3x*4 = 3x^2 - 12x.
B- It is a many-to-one function
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