–b–0 is equal to
-1×b
1-b-0
0-(-1)×b
-b-0-1
When 0 is subtracted from any number, the result is always the number itself.
Hence, -b-0=-b
And b×-1=-b
Thus, option A is the correct option.
1.P (x) is equal to ax , a is not equal to 0
a^2-4a-1=0 and a is not equal to 0,
find