Question

7. Find 'k'if 3 is the solution of 3x²+(k-3)x+9 = 0.
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Answer 1

Answer:

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Answer 2

Answer:

$3x {}^{2} + (k - 3)x + 9 = 0 \\ = > 3 \times 3 {}^{2} + (k - 3)3 + 9 = 0 \\ = > 27 + 3k - 9 + 9 = 0 \\ = > 3k = - 27 \\ = > k = - 9$