ГДЗ Математика 8 клас Істер (2025) - 1 ЧАСТИНА

Подайте у вигляді дробу:

1) (3a-b)/ab – (5b+3a)/ab = (3a-b-(5b+3a))/ab = (3a-b-5b-3a)/ab = –6b/ab = –6/a;
2) (9m+2k^2)/5k – (9m-3k^2)/5k = (9m+2k^(2 )- (9m-3k^2))/5k = (9m+2k^2- 9m+3k^2)/5k = (5k^2)/5k = k;
3) (5b- m^2)/(4m^3 ) – (m^2+ 5b)/(4m^3 ) = (5b- m^2- (m^2+ 5b))/(4m^3 ) = (5b- m^2- m^2- 5b)/(4m^3 ) = (-2m^2)/(4m^3 ) = –1/2m;
4) (4a-3)/6a + (a+8)/6a – (5-a)/6a = (4a-3+a+ 8-(5-a))/6a = (5a+5-5+a)/6a = 6a/6a = 1.