HOW DO YOU FACTOR a^3-27?
27=3^3
so
a^3-27=
a^3-3^3=
(a-3)(a²+3a+3²)=
(a-3)(a²+3a+9)
EXPLAIN FURTHER
To factor the expression a^3 - 27, we can first recognize that it is a difference of cubes. The general formula for factoring a difference of cubes is:
a^3 - b^3 = (a - b)(a^2 + ab + b^2)
In this case, we have a^3 - 27. Notice that 27 can be expressed as 3^3. So we can rewrite the expression as:
a^3 - 27 = a^3 - 3^3
Now we can apply the formula for factoring a difference of cubes:
a^3 - b^3 = (a - b)(a^2 + ab + b^2)
Using this formula, we substitute a = a and b = 3:
a^3 - 3^3 = (a - 3)(a^2 + 3a + 3^2)
Thus, factoring the expression a^3 - 27 results in (a - 3)(a^2 + 3a + 9).