A. Determine whether each mathematical sentence is a quadratic inequality or not.
1. x^2 + x ⩾ 0
2. a^2 < 19 + a
3. (y+5) (y-6) = 7
4. m^2 ≠ 2m + 8
5. s^2 > 9
B. Which of the following quadratic inequalities in A are in standard form?

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