Question

If a*b=a²+b²+ab+2 on Z,then3*4=.......,Select Proper option from the given options.
(a) 40
(b) 39
(c) 25
(d) 41

Answer 1

Right answer now
(b) 39

Answer 2

it is given the relation a*b = a² + b² + ab + 2 on Z

now, take a = 3 and b = 4
this type of question , you can easily solve . just put given numbers in place relation.
here given relation is a*b = a² + b² + ab = 2
similarly question want to find the value of 3*4
then, use 3*4 = 3² + 4² + 3 × 4 + 2

3*4 = 3² + 4² + 3 × 4 + 2

= 9 + 16 + 12 + 2

= 39

hence, option (a) is the correct answer.