Adding & subtracting rational expressions: like denominators | High School Math | Khan Academy

Sal adds 6/(2x²-7) + (-3x-8)/(2x²-7) and subtracts (9x²+3)/(14x²-9) - (-3x²+5)/(14x²-9).

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[nadiahazel]

This was so helpful! Please make a video with unlike denominators.

[vzm]

Just needed to watch this for refreshing my mind. Thanks! =)

[himasekiwari]

Excuse me could you tell me the formula of the adding rational expressions with the same denominator?