Question

please solve please​

Answer 1

Answer:

mark as brainliest

Step-by-step explanation:

=3^2+4^2+5^2-6^2

=9+16+25-36

=25+25-36

=50-36

=14

please please mark as brainliest

I really need a high rank

Answer 2

Answer:

The principle of reversibility presupposes that the attenuation of a light ray during its passage through an optical medium because of reflection, refraction, and absorption is not affected by a reversal of the direction of the ray.