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You find two numbers which add to -2 and multiply to -3.

These numbers are -3 and 1 so your factors are (x - 3)(x + 1), assuming your expression does in fact represent zero.

x is thus either 3 or -1.

Check: 32 - (2 * 3) - 3 = 0? yes; -12 - (2 * -1) - 3 = 0? yes.

QED

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12y ago
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Q: How do you solve x squared minus 2x minus 3?
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