Parameter from a known root

Parameter from a known root

Secondary 2
4 marks
TGM Original Questions

Core stretch

If \(x=4\) is a solution of \(3x^2+kx-28=0\), find

  1. \(k\), and[2]
  2. the other solution.[2]

Solution:

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Answer:(a) \(k=-5\) (b) \(x=-\dfrac73\).

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