ГДЗ Алгебра 8 клас Мерзляк (2025)

Подайте у вигляді дробу вираз:

1) 7k/18p – 4k/18p = (7k-4k)/18p = 3k/18p = k/6p;
2) (a-b)/2b – a/2b = (a-b-a)/2b = (-b)/2b = –1/2;
3) (a-12b)/27a + (a+15b)/27a = ((a-12b)+ (a+15b))/27a = (a-12b+a+15b)/27a = (2a+3b)/27a;
4) (x-7y)/xy – (x-4y)/xy = ((x-7y)- (x-4y))/xy = (x-7y-x+4y)/xy = (-3y)/xy = (-3y)/xy = –3/x;
5) (10a+6b)/(11a^3 ) – (6b-a)/(11a^3 ) = ((10a+6b)- (6b-a))/(11a^3 ) = (10a+6b-6b+a)/(11a^3 ) = 11a/(11a^3 ) = 11a/(11a^3 ) = 1/a^2 ;
6) (x^2- xy)/(x^2 y) + (2xy-3x^2)/(x^2 y) = ((x^2- xy)+ (2xy-3x^2))/(x^2 y) = (x^2- xy+2xy-3x^2)/(x^2 y) = (xy-2x^2)/(x^2 y) = (x(y-2x))/(x^2 y) = (y-2x)/xy.