Which equation has the components of 0 = x2 - 9x - 20 inserted into the quadratic formula correctly?
O
x= -9 V(-9) 2 - 4(1)(-20)
2(1)
Ox= 9V-9)2 - 4(1)(20)
2(1)
O
x= 91V(-9)2 - 4(1)(-20)
2(1)
O
x
= -9
(-9)2 + 4(1)(-20)
2011

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