Find the maximum value of the expression: -2x2 - 4x + 11.
Explanation:
We know, that maximum value of ax2 + bx + c occurs at x = -b/2a
∴ Maximum value of -2x2 - 4x + 11 occurs at x = -(-4)/2 × -2 = -1.
∴ The minimum value is -2 × (-1)2 - 4 × (-1) + 11 = -2 + 4 + 11 = 13
Hence, option (c).
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