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Anonymous
x = -1 OR x = 3
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x squared -2x-3 equals 0 is the same as (x + 1)(x - 3) = 0
If x squared -10 = 0 then x = the square root of 10
(x+4)(x-5) = 0
(x-3)(x-5) = 0
(x-3)(x-9) = 0