Let’s see this in a formula:
Here’s the proof using the FOIL method:
Not too complicated, so let’s see some examples.
First example (click here):
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1. Apply the formula
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This next one is a little more complicated.
Next example (click here):
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1. Rewrite the problem
2. Apply the formula
,
For our last example, we will see an application of the difference of two squares formula.
Last example (click here):
1. Rewrite the numbers
2. Apply the formula
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As you can see, this formula is simple, but very helpful. If you need more help or practice with this formula, check out Symbolab’s Practice.
Until next time,
Leah