Question

please explain How -b-0 is equal to -1×b

Answer 1

-b -0= -b
ANY NUMBER 'ADDED' OR SUBTRACTED FROM ZERO GIVES YOU THE SAME NUMBER
-1 ×b= -b
A NUMBER 'MULTIPLIED' BY ONE GIVES YOU THAT NUMBER ITSELF
also A NEGATIVE NUMBER MULTIPLIED BY A POSITIVE NUMBER IS ALWAYS NEGATIVE

THEREFORE
-b-0 = -1×b