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please help me understand so i may assist my daughter so she can understand Find the vertex , the focus , and the directrix ,

please help me understand so i may assist my daughter so she can understand

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Find the vertex , the focus , and the directrix , Draw the graph of * + 6* + by + 21 = 0 The focus ( Typo an ordered pair . ) What is the directrix ? Select the correct choice below and fill in the answer box to complete your choice A . The directrix isy 10 8 B . The directrix is Use the graphing tool to graph the equation

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