8 : 15 = 8/15

7 : 3 = 7/3

23 : 6 = 23/6

Complete the second sentence in each pair so that it has the same meaning the first

People invented the wheel thousands of years ago

->..the wheels have been invented for thousands of years

(x + 1) (x² - x + 1) - x (x² - 3) = 4

= x³ + 1 - x³ + 3x => 4

= 3x = 1 - 4 => -3

= x = -3 : 3 = -1

x = 1

<=> A = 1 - 1/ 1² - 9 + 1 / 1 + 3 = 0/-8 + 1/4 = 1/4