a ∗ b = a + 2b
a ∗ b = a + b - ab
a ∗ b = a2 + b
a ∗ b = a(b+1)2
Correct answer is B
a∗b=a+b−ab
b∗a=b+a−ba
On the set of integers, the two above are cumulative as multiplication and addition are cumulative on the set of integers.
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