Question

x • x = 2x

Answer 1

take any number x, and add it to itself to get

x+x = 2x

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for example

5+5 = 2*5

or

8+8 = 2*8

you can do this for any number

Answer 2

if you multiply x with itself, then

x times x = x^2

just by definition of what "squared" means

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Example:

8 times 8 = 8^2

Answer 3

so the answer would be true?

Answer 4

\[
x\cdot x=2x\\
xx-2x = 0\\
x(x-2)=0
\]If either factor is \(0\), then the whole product is zero and the equation holds.
So we end up with two equations:\[
x=0\\
x-2=0
\]

Answer 5

The answer is that sometimes they are equal, but they are not always equal.