Let a and b be the solutions of the equation 2x^2 + 10x + 5 = 0. What is the value of (2a - 3)(4b - 6)?
sum of roots = -b/a = -10/2 = -5
product of roots = c/a = 5/2
(2a - 3)(4b - 6) = 8ab - 12a - 12b + 18
= 8(5/2) - 12(-5) + 18
= 98
+1223 
