Question

If $x*y=x+y-x\times y$ , find $(-10)*5$

Answer 1

Finding $(-10)*5$

Given, $x*y=x+y-x\times y$

Now,

$(-10)*5$$=(-10)+5-(-10\times 5)$

$(-10)*5=(-10+5)-(-50)$

$(-10)*5$$=-5+50$

$\therefore (-10)*5$$=45$