One root of the quadratic equation x2 - 12x + a = 0, is thrice the other. Find the value of a?
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A boat takes 90 minutes less to travel 36 miles downstream than to travel the same distance upstream. If the speed of the boat in still water is 10 mph, the speed of the stream is
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The sum and the product of the roots of the quadratic equation x2 + 20x + 3 = 0 are?
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If the roots of the equation 2x2 - 5x + b = 0 are in the ratio of 2:3, then find the value of b?
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