Question Number 104253 by Anindita last updated on 20/Jul/20

When a∗b= ((a+b)/(a−b)) then what is the  answer of 2∗3×9∗10 ?

Commented bysom(math1967) last updated on 20/Jul/20

((2+3)/(2−3))×((9+10)/(9−10))=(5/(−1))×((19)/(−1))=95

Answered by OlafThorendsen last updated on 20/Jul/20

2∗3 = ((2+3)/(2−3)) = −5  9∗10 = ((9+10)/(9−10)) = −19  2∗3×9∗10 = (−5)×(−19) = 95