Mathematics for IGCSE & O level - Vectors (Section 3 - No. 38) | ExamPlay

Mathematics for IGCSE & O level - Vectors (Section 3 - No. 38)

If vector a = [2, 4] and b = [1, -3], calculate 2a - 3b.

[1, 17]

[1, 7]

[1, -1]

[1, -17]

Explanation

2a = [4, 8] and 3b = [3, -9]; 2a - 3b = [4-3, 8-(-9)] = [1, 17]

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