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If x= 2 is a root of the equation 3x2-2kx +5 = 0 , then find k |
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Answer» -2 is the root of the equation , so x=-2 Putting the value of x in equation3(-2)²- 5 (-2) +2k12 +10 +2k=02k+22 =02k= -22K= -11Hence the value of k is - 11. Given equation is 3x² -2kx +5 = 0and x=2So, 3(2)²-2k(2)+5=0 >3(4)-4k+5=0 >12-4k+5=0 >17-4k=0 >-4k=-17 >4k=17 >k=17/4 |
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