In the equation ax^2 + bx + c = 0 a, b, and c are constants, and abc # 0. If one root of the equation is -3, and b = 8a then which of the following is c equal to?
Select the correct option:
A) a/12
B) a/8
C) 15a
D) 8a
E) 12a
The sum of the roots is = -b/a = -8a/a = -8. Let the other root be x. Thus, x-3 = -8   x = -5. Again, the product of the roots is   -3*-5= 
<gadget id="calculator">  -3*-5</gadget>
<output>15</output>
15. Thus, c/a= 15. c = 15a.   15a.
<result>C</result>
In the equation ax^2 + bx + c = 0 a, b, and c are constants, and abc # 0. If one root of the equation is -3, and b = 8a then which of the following is c equal to?