Hi, (1/a+3)-(a/a^2-9)=(2/3-a) 1/(a+3)- a/(a+3)(a-3)= -2/(a-3) |Note Parenthesis used to show terms in denominator |Multiplying thru by (a+3)(a-3) so as all denominators = 1 (a-3) - a + 2(a+3) = 0 2a +3 = 0 2a = -3 a = -3/2