Question

simplify (5m-6m)²+(5m+6m)²​

Answer 1

Answer:

5m²-6m²=25-36=-11

Step-by-step explanation:

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Answer 2

Answer:

=> (5m-6m)² + (5m+6m)²

Using Identities: (a-b)² = a² + b² - 2ab

                         : (a+b)² = a² + b² + 2ab

=> (5m-6m)² + (5m+6m)²

=> [(5m)² + (6m)² - (2 x 5m x 6m)] + [(5m)² + (6m)² + (2 x 5m x 6m)]

=> [25m² + 36m² - 60m²] + [25m² + 36m² + 60m²]

=> [61m² - 60m²] + [61m² + 60m²]

=> 1m² + 121m²

=> 122m²

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