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The sum of p and q means (p+q).

The difference of p and q means (p-q).

Q: What is the sum or difference of p and q?

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It is: 4*(q+p)

The answer depends on what p and q are meant to represent.

The sum of -p and -q -

Yes, irrational. Let p = root 2 and q = root 3. Then (q - p)2 = 5 - 2root6, which is irrational because it is the sum of an integer (5) and an irrational (2root6), and so q - p (which is root3 - root2) is irrational.

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q - p

It is: 4*(q+p)

4(p + q), or 4p + 4q

The sum of -p and -q -

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)

The answer depends on what p and q are meant to represent.

The sum of -p and -q -

The sum of -p and -q -

2•(p-q)

Yes, irrational. Let p = root 2 and q = root 3. Then (q - p)2 = 5 - 2root6, which is irrational because it is the sum of an integer (5) and an irrational (2root6), and so q - p (which is root3 - root2) is irrational.