Question

rozwiaz rownanie za pomoca wzorow skroconego mnozenia:

(6+1/3x)(-1/3x+6)+(1/3x-4) do kwadratu=4

Answer 1

 

Answer 2

(6+1/3x)(-1/3x+6)+(1/3x-4)² = 4

(6 + 1/3x)(6 - 1/3x) + (1/3x)² - 2 * 1/3x * 4 + 4² = 4

6² - (1/3x)² + 1/9x² - 8/3x + 16 = 4

36 - 1/9x² + 1/9x² - 8/3x + 16 = 4

52 - 8/3x = 4

-8/3x = 4 - 52

-8/3x = -48     /*(-3/8)

x = 18