Question

2. (a + b) (a - b) =
a. (a + b)2
b. (a - b)2
c. a2 + b2 - 2ab
d. a? - b2

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Answer 1

Answer:

(a+b)(a-b)=a2-ab+ab-b2=a2-b2

Answer 2

Step-by-step explanation:

1. (a+b) (a-b)=a^2-b^2
2. (a+b)^2=a^2+2ab+b^2
3. (a-b)^2=a^2-2ab+b^2
4. a^2+b^2-2ab=(a-b)^2
5. a^2-b^2