Hi there!
The two parentheses are multiplied together, so in order for this equation to be equal to zero, you need at least one of the two parentheses to be equal to zero.
The solution A is good because even just in the first parentheses, if you replace the "x" by "-2" and solve the parentheses, you'll see that it equals 0 and anything multiplied by zero equals zero.
The solution C is good because if you replace "x" by "-1/3" in the second parentheses and you solve it, you'll see that it equals 0 and anything multiplied by zero equals zero.
The answer is : Solutions A and C are good.
There you go! I really hope this helped, if there's anything just let me know! :)
