Mathematics for IGCSE & O level - Vectors (Section 3 - No. 47)
What would be the resulting vector if a vector [3, 4] is multiplied by -2?
[6, -8]
[-6, -8]
[6, 8]
[-1, -2]
คำอธิบาย
Multiplying by -2 changes the sign of both components and doubles their magnitude.