Answer:

Step-by-step explanation:
hello,
first of all we will study the quadratic expressions
we can write that, (the different answers provide good clues :-) )

and

so first of all as we cannot divide by 0 we need to take x different from 7, -12 and -30 and then we can write

hope this helps
Answer:
why such complicated questions.....?
Step-by-step explanation:
Answer:
the angle is equal to 60 degree
Length of both legs are 5, the hypotenuse is 5sqrt(2) for an explanation, look up a 45 45 90 special right triangle on google