Answer:
DUDE WHO GAVE YOU THESE QUESTIONS
Sum 81 to both sides to get

Divide both sides by 4 to get

Consider the square root of both sides. Note that this requires the
sign, since
implies
, but also
. So, the solutions are

Step-by-step explanation:
can you show the picture too please
Answer:
Yes
Step-by-step explanation:
A rational number is a number that could be written in fraction form or ratio.