Question

8. If '*' operation be defined as a * b = a × b – (a + b), evaluate :
(1) 2 * 5
(ii) (- 4) * (-6)
(iii) (- 13) * (- 6)


needed urgent please fast ​

Answer 1

1) 2*5 =2+5-(2+5)=2+5-2-5-0

2) (-4)*(-6)= (-4)+(-6)-((-4)+(-6))=-4-6+4+6=0

3) (-13)*(-6)= (-13)+(-6)-((-13)+ (-6))=-13-6+13+6=0

Answer 2

Answer:

1) 2*5

a*b = a×b - (a+b)

2×5 - (2+5)

10 - 7

=3

2) (-4)*(-6)

a*b = a×b - (a+b)

(-4)×(-6) - (-4+[-6])

+24 - (-10)

=24+10

=34

3) 13*(-6)

a*b = a×b - (a+b)

13×(-6) - (13+[-6])

-78 - 7

= -85

I hope you got the correct answer.