Answer:
Option C
1.62 and -0.62
Step-by-step explanation:
v² - v - 1 = 0
From ax² + bx + c = 0
a = 1 b = -1 c = -1
Quadratic formula
x = -b +/- √b² - 4ac
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2a
x = -(-1) +/- √-1² - 4 x 1 x -1
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2(1)
x = 1 +/- √1 +4
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2
x = 1 +/- √5/2
x = 1 + √5/2 or x = 1 - √5/2
x = 1.618 or -0.618
