1) 5x 2-12x+4 6-15x 2)7x 2-x 2-13x-7x 2 3)2x 2+2x-24 - вопрос №89536601521246152722137232222462 от Derbeshto 18.09.2020 14:40

Question

Математика: 1) 5x 2-12x+4 6-15x 2)7x 2-x 2-13x-7x 2 3)2x 2+2x-24 (6-2x) 2 4)1-6c+y-6cy 1-112c-36c

Derbeshto · Answer

3х^2 - 5x - 24 = x^2 - 12x + 363x^2 - x^2 - 5x + 12x - 24 - 36 = 02x^2 + 7x - 60 = 0D = 49 - 4*(-60)*2 = 49 + 480 = 529     √D = 23x1 = (-7 + 23)/4 = 4x2 = (-7 - 23)/4 = -7,5ответ: х1 = 4;   х2 = - 7,5...

1) 5x> 2-12x+4 6-15x 2)7x> 2-x 2-13x-7x> 2 3)2x> 2+2x-24 (6-2x)> 2 4)1-6c+y-6cy 1-112c-36c