Question

номер 6 . 8 класс плзззззззззззззззззз​

Answer 1

Ответ:

a) 1, б) 0,6, в) -2 г) 2,5

Объяснение:

а) (x - 2) (x - 3) = x (x+1)

x^2 - 3x - 2x + 6 = x^2 + x

x^2 - 3x - 2x -x^2 - x = -6

-6x = -6

x = 1

б) (x+4) (x+6) - x^2 = 30

x^2 + 6x + 4x + 24 - x^2 = 30

x^2 + 6x + 4x - x^2 = 30 - 24

10x = 6

x = 0,6

в) (x - 5) (x + 1) - x = x^2 + 5

x^2 + x - 5x - 5 - x = x^2 + 5

x^2 + x - 5x - x - x^2 = 5 + 5

-5x = 10

x = -2

(x - 1) (x - 3) = (x - 2) (x - 4)

x^2 - 3x - x + 3 = x^2 - 4x - 2x + 8

x^2 - 3x - x - x^2 + 4x + 2x = 8 - 3

2x = 5

x = 2,5