I believe the answers are the following:
5. x = ±3.4641i
6. x = ±7
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Find (-4) on the number line and move 3 to the right. You will end up at (-1).
Find (3) on the number line and move 4 to the left. You will end up at the same value of (-1).
For a parabola if
a) Squared term is x
Parabola either opens up or down.
Positive coefficient means upward opening and negative coefficient means downward opening
b) Squared term is y
Parabola either opens right or left
Positive coefficient means rightwards opening and negative coefficient means leftwards opening
In the given question, since the squared term is y and coefficient is negative, the parabola will open towards left.
So correct answer is option B
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of this 
