Chứng minh rằng với mọi số tự nhiên n , n>1 thì C=n^4+n^2+1 là hợp số

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 20 = x a. 5, 4 b. -5, -4 c. -5, 4 d. 5, -4

Select all expressions that are equivalent to 2(3x + 7y). question 1 options: 6x + 14y 6x + 7y 1(6x + 14y)