Question

зробіть будь ласка ((

Answer 1

Ответ:

а) 5 - 6х - 9 = 10х + 7

-4 - 6х = 10х + 7

-6х - 16х = 7 + 4

-22х = 11

х = 11 ÷ (-22)

х = -0,5

б) 0,5 + х = 4 1/3

х = 4 1/3 - 1/2

х = 3 5/6

в) 4(2х - 3) + 6(х - 4) = 3(3х + 2)

8х - 12 + 6х - 24 = 9х + 6

14х - 36 = 9х + 6

14х - 9х = 6 + 36

5х = 42

х = 42 ÷ 5

х = 8,4

г) D = (-7)² - 4 × 6 = 49 - 24 = 25

x1 = (7 + 5) / 2 = 6

x2 = (7 - 5) / 2 = 1

д) D = 2² - 4 × 3 × (-5) = 4 + 60 = 64

x1 = (-2 + 8) / 6 = 1

x2 = (-2 - 8) / 6 = -1 2/3