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,If the equation 9x2 + 6kx + 4 = 0 has equal roots, then K = ? |
Answer» <p>equal root means discriminant is 0that is b²-4ac = 0so(6k)² - 4×9×4 = 036k² -144 = 0k² = 144/36k = √144/36k = + or - 12/6so k = -2 or +2</p> | |