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Khan Academy (English - US curriculum)
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Khan Academy (English - US curriculum)
Math by grade
Eureka Math/EngageNY
Algebra 2 (Eureka Math/EngageNY)
Module 1: Polynomial, rational, and radical relationships
Topic C: Lesson 25: Adding and subtracting rational expressions
Subtracting rational expressions
Subtracting rational expressions
Sal subtracts and simplifies (a-2)/(a+2) - (a-3)/(a²+4a+4).
License: CC BY-NC-SA by Khan Academy