Question

4. 6² - 4. 2,5² / 3 (6+2,5) (6-2,5)

Answer 1

4. 6² - 4. 2,5² / 3 (6+2,5) (6-2,5)=
4. 36 - 4.6,25/ 3 . 8,5 . 3,5 =
 144 - 25 / 89,25 =
 119/89,25 = 1,333... = 1+3/9 = 1+1/3= 4/3