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Find the value of m so that the quadratic equation mx(5x - 6) = 0 has two equal roots. |
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Answer» 5mx2 - 6mx + 9 = 0 b2 - 4ac = 0 ⇒ (-6m)2 - 4(5m)(9) = 0 ⇒ 36m(m - 5) = 0 ⇒ m = 0, 5 ; rejecting m = 0, we get m = 5 |
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