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If one root of the equation 2x2 + 3x – k = 0 is 6, what is the value of k ?
Solution
Substituting 6 in the quadratic equation we get2(6)2 + 3(6) − k = 072 + 18 − k = 0Therefore, k = 90
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If n is a root of quadratic equation ax2 + bx + c = 0Then, an2 + bn + c = 0
Study the given information carefully and answer the following questions Twelve people are sitting in two parallel rows containing six people each, in such a way that there is an equal distance between adjacent persons. In row-1 P, Q, R, S, T and V are seated and all of them are facing South. In row-2 A, B, C, D, E and F are seated and all of them are facing…
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