Question

a分之3+4a分之1 a+b分之a平方+a-b分之b平方-2ab a平方-4分之2a-a-2分之1 3a分之b+2b分之

Answer 1

a分之3+4a分之1

=12/4a+1/4a

=13/(4a)

a+b分之a平方+a-b分之b平方-2ab

=a²/(a+b)+(b²-2ab)/(a-b)

=(a³-a²b+ab²+b³-2a²b-2ab²)(a+b)(a-b)

=(a³-3a²b-ab²+b³)/(a²-b²)

a平方-4分之2a-a-2分之1

=2a/(a-2)(a+2)-1/(a-2)

=(2a-a-2)/(a+2)(a-2)

=1/(a+2)

3a分之b+2b分之a

=b/3a+a/2b

=(2b²+3a²)/6a