The product of the values of a for which 2^{2a+3 }- 65(2^{a }-1) = 57is

a. -3

b. 3

c. -9

d. 9

it jush check putting a value of a in the equation so that it satisfied both 3,-3 so product is -9

it jush check putting a value of a in the equation so that it satisfied both 3,-3 so product is -9