Question

If $x\times y=x^2+y^2-xy$ then the value of $9\times 11$ is :

• A. $93$
• B. $103$
• C. $113$
• D. $121$

Answer 1

The correct option is B $103$

$x\times y=x^2+y^2-xy$

$9\times 11=9^2+{11}^2-9\left(11\right)$

$=81+121-99$

$9\times 11=103$