couldn't find the right answer.. any help?

Question

. Explain why the following simplification is incorrect:
x+y=xy
Remember to use correct mathematical terminology.

A "first line-last line" check is used to check algebraic expressions.In your own words,expalin why this
check can prove that simplification is incorrect,but does not prove that a simplification is correct.
An example is not necessary,but it might help.

Answer 1

Explain why this check can prove that simplification is incorrect,but does not prove that a simplification is correct.

The above sentence is structurally not correct.

 

x+y=xy

 

If you can find at least 1 example that disproves this, then the equation is not correct.

Choose x = 2, y =3

2 x 3 ≠ 2 + 3