For all real numbers a and b, 2a • b = a^2 + b^2
5 answers
only if a=b
is it true or false?
is it true?
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?
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?
Solution for the variable b
b=a
b=a
1 answer