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MATHEMATICS

JAMB 2001 - Question 19

Mathematics 2001 JAMB Past Questions - Question 19: Evaluate 4 2 -1 3 2 -1 -1 1 3

Choose the correct answers from the options given.

Evaluate 4 2 -1 3 2 -1 -1 1 3

A: 25

B: 45

C: 15

D: 55

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Correct Answer

Explanation

4[(3 x 3) - (-1 x 1)] -2 [(2x 3) - (-1 x -1)] -1 [(2 x 1) - (-1 x 3)]= 4[9 + 1] -2 [6 - 1] -1 [2 + 3]= 4(10) - 2(5) - 1(5)= 40 - 10 - 5= 25