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If \(a?b = 3a^2 + 2b - 1,\) then \(2?3 =\)

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If \(a?b = 3a^2 + 2b - 1,\) then \(2?3 =\)

by Gmat_mission » Wed Sep 23, 2020 5:31 am

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A

B

C

D

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If \(a?b = 3a^2 + 2b - 1,\) then \(2?3 =\)

A. 12
B. 17
C. 30
D. 37
E. 41

Answer: B

Source: Princeton Review
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Re: If \(a?b = 3a^2 + 2b - 1,\) then \(2?3 =\)

by deloitte247 » Fri Sep 25, 2020 6:31 pm
$$2?3=3\left(2^2\right)+2\left(3\right)-1$$
$$=3\left(4\right)+6-1$$
$$=12+6-1=17$$
Answer = B
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