Решить уравнения х+1)^2 - (3х-1)^2 = 11х+ 1, 2 - вопрос №484597812312111225232120 от DEAFKEV 02.02.2021 11:38

Question

Алгебра: Решить уравнения х+1)^2 - (3х-1)^2 = 11х+ 1, 2 2) (5+2у)(у-3) -2 (у-1)^2 = 0

DEAFKEV · Answer

1) (3х+1)^2 - (3х-1)^2 = 11х+ 1, 29x^2 +6x  + 1 -(9x^2 - 6x +1) -11x -1.2 = 09x^2 +6x  + 1 -9x^2 + 6x -1 -11x -1.2 = 0x -1.2 = 0x = 1.22) (5+2у)(у-3) -2 (у-1)^2 = 05y -15 +2y^2 -6y -2(y^2 -2y +1) = 0-y -15 +2y^2 - 2y^2 +4y -2 = 03y -17 =03y = 17y = 17/3y = 5  2/3...