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put this solution on YOUR website!a: x^2 - 13 = 0
x^2 = 13 add thirteen
x =

or

square root each side
b: 16x^2 = 9
x^2 = 9/16 divide each side by sixteen
x = 3/4 or -3/4 square root each side
c: (x - 5)^2 = 27
x - 5 = +-

square root each side
x = 5 +-

add five