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m equals 4.815 (to 3 decimal places) & -5.815 (to 3 decimal places) for:

m2 + m - 28 = 0

If we substitute these values into the quadratic formula:

x = (-b + or - (b2 - 4ac)1/2) / 2a

then we have:

m = (-1 + or - (12 - (4 * 1 * -28))1/2) / (2 * 1)

m = (-1 + or - (1 - -112)1/2) / 2

m = (-1 + or - (1131/2)) / 2

m = -1 + or - 10.630 (to 3 decimal places) / 2

m = 4.815 (to 3 decimal places) & -5.815 (to 3 decimal places).

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Q: What does 0 equals m2 plus m -28 equal?
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