book Maths Puzzle Numerical Ability

Hello,
Can you please show me how to simplify this? I need to know in steps. (x-2) (2x+3)

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book Other Question

1)
if x=2, what is y #2) if x=2/3, what is y #3) if x=3.25, what is y tobin has 66 coins that are all pennies and nickels. the total amount of money she has is $2.38. howm many pennies and kickels does she have?