ГДЗ Алгебра 8 клас Мерзляк (2025)

Спростіть вираз:

1) b + 7 – 14b/(b+7) = (b+ 7^(\b+7))/1 – 14b/(b+7) = ((b+7)^2- 14b)/(b+7) = (b^2+ 14b+49-14b)/(b+7) = (b^2+ 49)/(b+7);
2) 5c – (10-29c+10c^2)/(2c-5) + 2 = (5c+ 2^(\2c-5))/1 – (10-29c+10c^2)/(2c-5) = ((2c-5)(5c+2)- (10-29c+10c^2))/(2c-5) = (10c^2+ 4c-25c-10-10+29c-10c^2)/(2c-5) = (8c-20)/(2c-5) = (4(2c-5))/(2c-5) = 4.