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Answer :

Breannaestes06go
#1 is A

I hope this helps I don’t know the other ones
Mhanifago

Answer:

#1

  • y = x² - 8x - 20
  • y = (x - 10)(x + 2),
  • zero's are (10, 0) and (- 2, 0)

Vertex is:

  • x = -8/-2 = 4, y = 4² - 8*4 - 20 = -36

Correct choice is A

#2

  • x² + 1/3x = 4
  • x² + 2*x*(1/6) + (1/6)² = 4 + 1/36
  • (x + 1/6)² = 4 1/36

Correct choice is A

#3

  • (-√-1) = -i
  • i² = -1 ⇒ i²ⁿ = -1
  • i²ⁿ⁺¹ = -i

Correct choice A or B

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