a and b are real numbers
We have the following expressions:
a² - b² = 9
a.b = 3
Question: what are the value(s) for a and b ?
Good luck! And try to be among the first ones!
Also in Australia, though usually positioned mid-line: • (<Alt>-0149). So it would have been better shown as a•b=3.
But I think anyone with half a brain would have understood the fullstop as 'multiply'.