exam Maths Puzzle Numerical Ability

Given A = [3 -2]
1 4

and B = [-1 5
2 3]

, find find 2A - 3B.

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exam Other Question

5x + y = 20 Please help me,I am totally confused with this.

What is the difference between 2x^2+4xy-3 and x^2-2xy-4

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