Question

If is a binary operation such that $a\ast b=a^2+b^2$ then $3\ast 5$ is

• A. 34
• B. 9
• C. 8
• D. 25

Answer 1

Answer: (A)

34

$a\star b=a^2+b^2\left(\text{Given}\right)$

Therefore,

$3\star 5=3^2+5^2=9+25=34$

Hence the correct answer is $34$.