What does cubic expansion mean?
Simply put, cubic expansion is expansion of any parentheses containing expressions that are raised to the third degree. However, here, our focus will be only binomial cubic expansions, where the word binomial just means only expansion of exactly two terms inside the parentheses (not one, or three but exactly two!). To be explicit, we will look at cubic expansion that similar to the one below:
Simply put, cubic expansion is expansion of any parentheses containing expressions that are raised to the third degree. However, here, our focus will be only binomial cubic expansions, where the word binomial just means only expansion of exactly two terms inside the parentheses (not one, or three but exactly two!). To be explicit, we will look at cubic expansion that similar to the one below:
How to use this concept?
You can apply this concept in a variety of situations when one of the variables inside the parenthesis is unknown and you need the expansion to solve a problem. Or the expansion formula above can be used when a and b are both numbers that when added is big and you can’t find the sum’s cube, but using the formula, you breakdown the expansion in a more bitesize manner allowing you to do the calculations easily.
Sample Math Problems
Question: Use the formula to expand:
Solution:
