Answer:

Step-by-step explanation:
We know that 
Also , 
So ,

Answer:
if you're asking for the reciprocal.
if you're asking the opposite of a reciprocal.
Step-by-step explanation:
The reciprocal is the number flipped or in this case
Answer: 
Step-by-step explanation:
We know that the standard quadratic equation is ax^2+bx+c=0
Let's compare all the given equation to it and , find discriminant.
1. a=2, b= -7, c=-9
So it has 2 real number solutions.
2. a=1, b=-4, c=4

So it has only 1 real number solution.
3. a=4, b=-3, c=-1

So it has 2 real number solutions.
4. a=1, b=-2, c=-8
So it has 2 real number solutions.
5. a=3, b=5, c=3

Thus it does not has real solutions.
Answer:
61.9047619048
Step-by-step explanation:
325/5.25= 61.9047619048
Answer: X + X= 2x or X squared.
Step-by-step explanation: