Answer:

Step-by-step explanation:
Given

Required
Determine the reciprocal
If a number is x, the reciprocal is: 1/x
So, the reciprocal of
is:


So, we have:


Evaluate all exponents

Take inverse of 9/49

Hence, the reciprocal of
is 
Answer:
x is equal to -9 thus it becomes -18 in the whole setup
Answer:
x = (-5 ± √57) / 2
Step-by-step explanation:
x² = 8 − 5x
x² + 5x − 8 = 0
Solve with quadratic formula:
x = [ -b ± √(b² − 4ac) ] / 2a
x = [ -5 ± √(25 − 4(1)(-8)) ] / 2
x = (-5 ± √57) / 2
What do you mean ? Parent and child ?