Q.7) Find the value of K , in quadratic equation 2x2 + Kx +9/8 = 0 if its roots
are equal.
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Answer:
» 2x² + kx + 9/8 = 0
» a = 2, b = k, c = 9/8
According to the given condition
» b² - 4ac = 0
» k² - 4 (2) (9/8) = 0
» k² = 9
» k = ± 3
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