Question

solve it please with using a formula

Answer 1

problem is solved in picture plzz check out

Answer 2

hello....
$= \frac{ {(8.7)}^{2} - {(1.3)}^{2} }{8.7 + 1.3}$
formula used=
${a}^{2} - {b}^{2} = (a + b)(a - b)$


kinda mark it as brainliest.