Discussion

Explanation:

We know, that minimum value of ax2 + bx + c occurs at x = -b/2a

∴ Minimum value of x2 - 4x + 10 occurs at x = -(-4)/2 × 1 = 2.

∴ The minimum value is (2)2 - 4 × 2 + 10 = 4 - 8 + 10 = 6

Hence, option (d).

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