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21 March, 05:02

Completing the square. a^2+2a-3=0

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  1. 21 March, 05:08
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    a^2 + 2a - 3 = 0

    a^2 + 2a = 3

    a^2 + 2a + 1 = 3 + 1 (I added a 1 to both sides)

    a^2 + 2a + 1 = 4

    (a + 1) ^2 = 4

    a = - 3, 1
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