Question

For all real numbers a and b, 2a • b = a^2 + b^2

Answer 1

only if a=b

Answer 2

is it true or false?

Answer 3

is it true?

Answer 4

Sam, did you not see Steve's reply?
why not try some values?

e.g. let a = 4, b = 5
then 2ab= 2(4)(5) = 40
a^2 + b^2 = 16 + 25 = 41

so what do you think?

Answer 5

Solution for the variable b
b=a