Question

9.68×9.68-3.18×3.18/(9.68+3.18)​

Answer 1

$\begin{gathered}2) Find \: \: the \: \: value \: \: of \: \: \frac{9.68 \times 9.68 - 3.18 \times 3.18}{9.68 + 3.18}. \\ \\ let \: \: be \: \: 9.68 = a \: \: and \: \: 3.18 = b \\ \\ \therefore \: \: given \: \: this \: \: \frac{a \times a - b \times b}{a + b} \\ \\ = \frac{ {a}^{2} - {b}^{2} }{a + b} \\ \\ = \frac{(a + b)(a - b)}{(a + b)} = (a - b) \end{gathered}$

Now put the value of a and b

9.68-3.18=6.50