Question

For all real numbers a and b, 2a • b = a2 + b2 Is this true or false? Explain why it false or true.

Answer 1

It's false.... correct is a2+2ab+b2

Explanation:

This cannot be factored anymore although. when we try to substitute a with 5 and b with 2, the answer in the right hand side of the equation is -9.

That's why it's false.