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3. x2 +2x - 3 = 0
A. {1, -3}
B. {-1, 3}
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[tex] {x}^{2} + 2x - 3 = 0 \\ (x + 3)(x - 1) = 0\\ [/tex]

[tex]x + 3 = 0 \\ x = - 3[/tex]

[tex]x - 1 = 0 \\ x = 1[/tex]

Therefore, the answer is:

[tex]b. \: \: - 1, \: \: \: 3[/tex]

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