Question

(9*7+8*9-15*9):(1+3+5+7+.....+17+19)

Answer 1

(9 x 7 + 8 x 9 - 15 x 9) : (1 + 3 + 5 + 7 + ... + 17 + 19)

= 9 x (7 + 8 - 15) : (1 + 3 + 5 + 7 + ... + 17 + 19)

= 9 x 0 : (1 + 3 + 5 + 7 + ... + 17 + 19)

= 0

Answer 2

(9 x 7 + 8 x 9 - 15 x 9) : (1 + 3 + 5 + 7 + ... + 17 + 19)

= 9 x (7 + 8 - 15) : (1 + 3 + 5 + 7 + ... + 17 + 19)

= 9 x 0 : (1 + 3 + 5 + 7 + ... + 17 + 19)

= 0