exam Maths Puzzle Numerical Ability

Multiply the complex numbers.



(5 + 2i)(2 - i)

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exam Other Question
Solve each of the systems by adding. If a unique solution does not exist, state whether the system is inconsistent or dependent.
2x + 3y = 1
5x + 3y = 16

I am having a hard time with these and need a little help.
 What is linear factoring and can you explain on how to do this problem:

*which of the following is a linear factor of 2x^2-x-6?

a. 2x-3
b. x+2
c. 2x+3
d. x-3