Назад
ГДЗ Алгебра 8 клас Мерзляк (2025)
§ 1. Раціональні вирази
.jpg?1756641105)
Реклама:
4) (5a+3)/(2a^2+ 6a) + (6-3a)/(a^2- 9) = (5a+ 3^(\a-3))/(2a(a+3)) + (6-3a^(\2a))/((a-3)(a+3)) = ((a-3)(5a+3)+ 2a(6-3a))/(2a(a-3)(a+3)) = (5a^2+ 3a-15a-9+12a-6a^2)/(2a(a-3)(a+3)) = (-a^2- 9)/(2a(a-3)(a+3)) = (-a^2- 9)/(2a(a-3)(a+3)) = –(a^2+ 9)/(2a^3- 18a);
5) a/(a^2- 4a+4) – (a+4)/(a^2- 4) = a^(\a+2)/((a-2)^2 ) – (a+ 4^(\a-2))/((a-2)(a+2)) = (a(a+2)- (a+4)(a-2))/((a-2)^2 (a+2)) = (a^2+ 2a-(a^2- 2a+4a-8))/((a-2)^2 (a+2)) = (a^2+ 2a- a^2- 2a+8)/((a-2)^2 (a+2)) = 8/((a-2)^2 (a+2));
6) 2p/(p-5) – 5/(p+5) + (2p^2)/(25- p^2 ) = (2p^(\p+5))/(p-5) – 5^(\1p-5)/(p+5) – (2p^2)/(p^2- 25) = (2p(p+5)- 5(p-5)- 2p^2)/((p-5)(p+5)) = (2p^2+ 10p-5p+25-2p^2)/(p^2- 25) = (5p+25)/((p-5)(p+5)) = (5(p +5))/((p-5)(p+5)) = 5/(p-5);
5) a/(a^2- 4a+4) – (a+4)/(a^2- 4) = a^(\a+2)/((a-2)^2 ) – (a+ 4^(\a-2))/((a-2)(a+2)) = (a(a+2)- (a+4)(a-2))/((a-2)^2 (a+2)) = (a^2+ 2a-(a^2- 2a+4a-8))/((a-2)^2 (a+2)) = (a^2+ 2a- a^2- 2a+8)/((a-2)^2 (a+2)) = 8/((a-2)^2 (a+2));
6) 2p/(p-5) – 5/(p+5) + (2p^2)/(25- p^2 ) = (2p^(\p+5))/(p-5) – 5^(\1p-5)/(p+5) – (2p^2)/(p^2- 25) = (2p(p+5)- 5(p-5)- 2p^2)/((p-5)(p+5)) = (2p^2+ 10p-5p+25-2p^2)/(p^2- 25) = (5p+25)/((p-5)(p+5)) = (5(p +5))/((p-5)(p+5)) = 5/(p-5);