Question

б) b(b — а+ 1) — a(a – b+1)
при а =2/3
b =1/3​

Answer 1

Ответ:

Объяснение:

b(b-a+1)-a(a-b+1)=

=b²-ab+b-a²+ab-a=

=b²+b-a²-a=

=b(b+1)-a(a+1)         pri a=2/3 i b=1/3

1/3(1/3+1)-2/3(2/3+1)=

=1/3*(1 1/3)- 2/3 *(1 2/3)=

=1/3*4/3 - 2/3*5/3=

=4/9-10/9=   -6/9= -2/3