If m * n = [mn − nm] for m, n belong to R, evaluate − 3 * 4

Assessment: JAMB UTME - Mathematics - 2017 Subject: General Mathematics

Question 1 Report

If m * n = [mn − nm] for m, n belong to R, evaluate − 3 * 4
Answer Details
m * n =  m n  -  m n
m = − 3
n = 4
∴ − 3 × 4 =  − 3 4  -  − 4 − 3
=  3 ( − 3 ) − ( − 4 × 4 ) 12
=  − 9 + 16 12
= 

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