Problem

Factorize the sum of cubes \(x^3 + 8\)

Answer

Expert–verified
Hide Steps
Answer

Simplifying the above expression gives us \(x^3 + 8 = (x + 2)(x^2 - 2x + 4)\)

Steps

Step 1 :The sum of cubes can be factorized using the formula \(a^3 + b^3 = (a + b)(a^2 - ab + b^2)\). Thus, for \(x^3 + 8\), \(a\) corresponds to \(x\), and \(b\) corresponds to \(2\), as \(2^3 = 8\)

Step 2 :By substituting \(a\) and \(b\) into the formula, we get \(x^3 + 2^3 = (x + 2)(x^2 - 2x + 2^2)\)

Step 3 :Simplifying the above expression gives us \(x^3 + 8 = (x + 2)(x^2 - 2x + 4)\)

link_gpt