Find k, for real roots : x² -kx +4 =0.
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saurabhsinghbihari:
what's the answer?
Answered by
11
hey there !!
given that:
= > x² - Kx + 4 = 0
=> for roots to be real D ≥ 0
=> b² - 4ac ≥ 0
=> k² - 4.4 ≥ 0
=> k² - 16 ≥ 0
=> k² ≥ 16
=> or equality holds
=> k = ± 4
ans......
hope it will help u
given that:
= > x² - Kx + 4 = 0
=> for roots to be real D ≥ 0
=> b² - 4ac ≥ 0
=> k² - 4.4 ≥ 0
=> k² - 16 ≥ 0
=> k² ≥ 16
=> or equality holds
=> k = ± 4
ans......
hope it will help u
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