Table and graph of a quadratic

Table and graph of a quadratic

Secondary 2
TGM Original Questions

For \(y=2x^2-8x-3\):

  1. find the missing table entry \(p\)
  2. draw the graph for \(-1\le x\le5\)
  3. find the minimum point
  4. estimate
    1. the roots, and
    2. solutions of \(2x^2-8x=5\).
\(x\)-\(1\)\(0\)\(1\)\(2\)\(3\)\(4\)\(5\)
\(y\)\(7\)-\(3\)-\(9\)-\(11\)\(p\)-\(3\)\(7\)

Solution:

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Answer:(a) \(p=-9\); (c) \((2,-11)\); (d)(i) \(x\approx-0.35,4.35\); (ii) \(x\approx-0.55,4.55\).

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