C

C

a) 3 x (x² - 4) = 0

3x² - 12 = 0 

3x² = 0 + 12

3x² = 12

x² = 12 - 3

x² = 9

46685 + x = 98764

x = 98764 - 46685 

x = 52079

x x 6 = 366

x = 366 : 6

x = 61

(76540 + 21876) : 2 = 98416 : 2 = 49208

48576 + 250 : 5 = 48576 + 50 = 48626

x + 17 = 10⁵ : 10³

x + 17 = 1000000 : 10000

x + 17 = 100

x = 100 - 17

x = 83

76325 + 12780 = 89105

7216 x 5 = 36080

87965 - 3678 = 84287

97860 : 5 = 19572

3 (x + 2) + (x + 1) + (x + 3)

=> 3x + 6 + x² + 3x + x + 3

=> 6x + 9 + x² + x

= 6/2 - 9/4 = 12/4 - 9/4 = 3/4

(2/3x - 3/2y) (2/3x + 3/2y)

=> 2/3x² + 3/2y²

75 . (x - 3) = 150

(x - 3) = 150 : 75

x - 3 = 2

x = 2 + 3

x = 5