Question

упростите выражение 2b-4b^2÷b+1×b+1÷2b^2

Answer 1

= 2(b-2b)/(b+1) X(b+1)  X 1 /2b ^2 = b -2b /(b+1)(b+1) X 1/b^2 = 1-2b / (b+1)(b+1) X b