Crystal claims that there are two solutions to the problem 15x^2=540 . which statement accurately describes the validity of crystal's claim? answer choices: a) it is correct because both 36 and -36 work. b) it is correct because all positive numbers have a positive and a negative square root. c) it is not correct because the only solution is 6. d) it is not correct because you must take the square root of both sides before dividing.