Answer:
The answer is B
hope it helps
(α + β)²
= (α + β)(α + β)
= α(α + β) + β(α + β)
= α² + αβ + αβ + β²
= α² + 2αβ + β²
answer #3 is correct, 3^1•3^7=3^2•3^5
because 3^1•3^7=3^8 and 3^2•3^5=3^8. they are equal!
