Khan Academy
4:54
Khan Academy
Khan Academy
When an expression can be viewed as the difference of two perfect squares, i.e. a²-b², then we can factor it as (a+b)(a-b). For example, x²-25 can be factored as (x+5)(x-5). This method is based on the pattern (a+b)(a-b)=a²-b², which can be verified by expanding the parentheses in (a+b)(a-b).
Apr 9, 2017
Difference of two squares Examples
Factoring using the difference of squares pattern
1:49
Factoring using the difference of squares pattern
Khan AcademySal Khan,Monterey Institute
Feb 20, 2011
30K views · 30 reactions | Gauthmath helps with your math. Welcome to Gauthmath! What is the result of (a+b)(a-b)? It's a²-b² i.e. the difference of two squares. Let's take a look at this expression (9+1)(9-1). We could get the result 9²-1² based on the pattern (a+b)(a-b)=a²-b². Then, how to solve a question like this? (9+1)(9²+1)(9⁴+1)(9⁸+1) Let's find the answer in snowball effect! | Gauth | Facebook
2:56
30K views · 30 reactions | Gauthmath helps with your math. Welcome to Gauthmath! What is the result of (a+b)(a-b)? It's a²-b² i.e. the difference of two squares. Let's take a look at this expression (9+1)(9-1). We could get the result 9²-1² based on the pattern (a+b)(a-b)=a²-b². Then, how to solve a question like this? (9+1)(9²+1)(9⁴+1)(9⁸+1) Let's find the answer in snowball effect! | Gauth | Facebook
FacebookGauth
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