Question: If the graph of the quadratic function f(x) = x + dx + 6d has its vertex on the x-axis, what are the possible

If the graph of the quadratic function f(x) = x + dx + 6d has its vertex on the x-axis, what are the possible values of d? (Enter your answers as a comma-separated list.) d = What if f(x) = x + 5dx - d + 1? (Enter your answers as a comma-separated list.) d= Additional Materials Reading

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