gabby15226 gabby15226

16-02-2020
Mathematics

contestada

Determine the valeur for k in the equation below:

x2 + kx + 9 = 0

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surjithayer10 surjithayer10

16-02-2020

Answer:

Step-by-step explanation:

Disc.=k²-4×9

roots are real if k²-36≥0

|k|≥ 6

k≤- 6

or k≥ 6

roots are imaginary if k²-36≤0

k²≤ 36

|k|≤6

roots are imaginary if -6 ≤ k ≤6

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anna5157 anna5157

16-02-2020

k = -9+x2 divides by x

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