Question

list all the identities and their expansions​

Answer 1

Answer:

which identity and expansion

Answer 2

Step-by-step explanation:

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1. (x + a) (x + b) ⟹ x²+ (a + b) x + ab
2. (x + a) (x – b) ⟹ x²+ (a – b) x – ab
3. (x – a) (x + b) ⟹ x²– (a – b) x – ab
4. (x – a) (x - b) ⟹ x² – (a – b) x – ab
5. (a + b)² ⟹ a² + 2ab + b²
6. (a - b)² ⟹ a² - 2ab + b²
7. (a + b) (a – b) ⟹ a²– b²
8. ( a + b + c)² ⟹ a² + b² + c² + 2ab + 2bc + 2ac
9. ( a + b - c)² ⟹ a² + b² + c² - 2ab - 2bc - 2ac