Question

18. 27 - 1000 x3. (factories)​

Answer 1

Answer:

Example: Factor x 3 + 27.

Think of 27 as 3 3. Then this is a sum of cubes and we can apply the sum of cubes formula: a 3 + b 3 = (a + b) (a 2 − a b + b 2 ).

Substituting a = x and b = 3 into the formula yields: x 3 + 27 = (x + 3