Answer:
hi
Step-by-step explanation:
Answer:
1. no
2. yes
3. no
4. yes
5. yes
Step-by-step explanation:
Answer:x=8/5 or 1.6
Step-by-step explanation:
Answer:
-2(x+2)(4x-35)
Step-by-step explanation:
Answer:
There are no extraneous solutions
Reasoning:
An extraneous solution is a solution that isn't valid, it might be imaginary like the square root of a negative number.
first we want to isolate z:
1+sqrt(z)=sqrt(z+5)
^2 all ^2 all
(1+sqrt(z))(1+sqrt(z))=z+5
expand
1+2sqrt(z)+z=z+5
-1 -z -z -1
2sqrt(z)=4
/2 /2
sqrt(z)=2
^2 all ^2 all
z=4
Since there is one solution and it is a real number, there are no extraneous solutions.
