Question

Solve it as fast as u can plz urgent and ans these both ques

Here two person can ans so 1 will and 1 and 2 will ans 2 ppz

Answer 1

(a-b)³-3(a-b)²+(a-b)+1=0
a³-b³-3a²b+3ab²-3a²-3b²+6ab+a-b+1=0..(1)
whenx=a
a³-3a²+a+1=0..(2)
whenx=a+b
(a+b)³-3(a+b)²+a+b+1=0
a³+b³+3a²b+3ab²-3a²-3b²-6ab+a+b+1=0..(3)
add 1+2
2a³+6ab²-6a²-6b²+2a+2=0
2(a³-3a²+a+1)+6ab²-6b²=0
from2,a³-3a²+a+1=0
now6ab²-6b²=0
6b²(a-1)=0
or a-1=0
or a=1
put a=1 in (1)
1³-b³-3b+3b²-3-3b²+6b+1-b+1=0

-b³+2b=0
2b=b³
or b²=2
or b=+-√2