Question 60929
(w -12)* (aw+9) = 0

That is (w - 12) = 0             (1)

Or (aw + 9) = 0                  (2)


 w = 12                           
	
Now substitute w =12 in equation (2), we get

a *12 + 9 = 0 

12 a +  9 = 0

12 a = -9

a = -9 /12 = - 3 / 4

Therefore the value for  a = (-3/4)