Question
If the quadratic equation x² + 18x + n = 0 has real and
equal roots, what is the value of n?Solution
ATQ,
Discriminant = 0 ⇒ 18² - 4×1×n = 0
⇒ 324 = 4n
⇒ n = 81
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Branch of physics dealing with the properties of sound
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Diligence
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IMITATION
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