Question 131609
8k^2-19k+9 the AC is good way to do factoring
Ac= 8*9 = 72
so now we looking for two numbers the product of the is 72 and the sum is 19
 factor out the 72 starting with one 
72= 1.72     sum 73
    2.36      38
    3.24      27
    4.18      22
    6.12      18
    8.9       17
  not by AC method USe Quadritic formula  this equation to double check 
D= B^2-4AC = (19)^2-4(72)= 361 -288 = 73

x= (-b +- sqrt( b^2-4*a*c ))/(2*a)
x= -(-19)+-sqrt(73)/ 2(8)= 19 +sqrt(73)/ 16 and 19 - sqrt(73)/ 16 that it