One root of the quadratic equation x2 - 12x + a = 0, is thrice the other. Find the value of a? Choose the most appropriate option
A) 21  B) 25  C) 27  D) 29  E) 31
Let the roots of the quadratic equation be x and 3x.   Sum of roots = -(-12)= 
<gadget id="calculator">-(-12)</gadget>
<output>12</output>
12   a + 3a= 4a = 12 =&gt; a = 3   Product of the roots = 3a2 = 3(3)2 = 27.   27)
<result>C</result>
One root of the quadratic equation x2 - 12x + a = 0, is thrice the other. Find the value of a?