Answer:
Idk?
Step-by-step explanation:
a2+b2= (a+b)2 - 2ab
a2+b2= (5)2 + 2(6)
a2+b2= 25+12.
a2+b2= 37
For Q1 and Q2
For Q3 and Q4
The third one
y=>x+1
y=<x-1
removing y
x-1 => x+1
removing x
we have no solution