Question

7. If '*' operation be defined as a * b = a x b - (a + b), evaluate :
(1) 2 * 5
(ii) (- 4) * (-6)
(iii) 13 * (-6)
(iv) - 7 * 5​

Answer 1

Answer:

1= 10

2=24

3= -78

4 = -35

Step-by-step explanation:

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Answer 2

Answer:

(I) 2 * 5 : 2×5-(2+5) = 10-7 = 3

(ii) (- 4) * (-6) : (-4)×(-6)-[(-4)+(-6)] = 24-(-2) =24+2= 26

(iii) 13 * (-6) : 13×(-6)-[13+(-6)] = -78-7 = -85

(iv) - 7 * 5 : (-7)×5-[(-7)+5] = -35-(-2) = -35+2 = -33

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