Question

How to solve it without multiplying

Answer 1

here is ur answer dude

Answer 2

Let x = 12.87
y = 7.13
z = 11.48

So we base this question on the formula of

$\frac{ {x}^{2} - {y}^{2} }{z} = \frac{(x + y)(x - y)}{z}$
Now putting the values

$\frac{(12.87 + 7.13)(12.87 - 7.13)}{11.48}$

$= \frac{(20)(5.74)}{11.48}$
$= \frac{114.8}{11.48}$
$= 10$
So that's is your answer.

Hope it'll help... :-D