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find the values of k for each of the following quadratic equations ,so that they have two equal roots: |
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Answer» Answer: The answer is +or -2 Step-by-step explanation: As, 2X2 + kx + 3 = 0 Comparing the GIVEN equation with ax2 + bx + c = 0, we get, a = 2, b = K and c = 3 As we know, DISCRIMINANT = b2 – 4ac = (k)^2 – 4(2) (3) = k^2 – 24 For EQUAL roots, we know, Discriminant = 0 k^2 – 24 = 0 k^2 = 24 k = ±√24 = ±2√6 |
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