Question

Fill in the blank

$\begin{array}{ccc}14& 11& \left(75\right)\\ 11& 7& \left(72\right)\\ 10& 6& (-)\end{array}$

Answer 1

The third number in each row is the difference between the squares of the first and second numbers.
Formula : $a^2-b^2=c$
${14}^2=196;{11}^2=121;196-121=75$
${11}^2=121;7^2=49;121-49=72$
${10}^2=100;6^2=36;100-36=64$