Oh, dude, it's like this: if you have p plus q, you just add the two together. And then, if you have 2p, you're basically doubling p. So, technically, the answer is p + q and 2p. Hope that clears things up for ya!
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The expression "p + 2q" represents the sum of a variable p and twice the value of another variable q. This can also be written as p + 2 * q, where the asterisk denotes multiplication. In algebraic terms, this expression cannot be simplified further unless specific values are assigned to the variables p and q.
-2p squared
The difference of p and q can be written : p - q Twice the difference is therefore 2 x (p - q) which can also be written as 2(p - q) OR 2p - 2q. Consequently you can create another variable (say) y and make this equal to twice the difference of p and q by simply writing, y = 2(p -q)
5p-1=2p-20 3p=21 p=7
P! / q!(p-q)!