1.

Find the maximum value of –x2 – 8x + 7.1. 72. 133. 234. 3

Answer» Correct Answer - Option 3 : 23

Given:

The given polynomial is –x2 – 8x + 7

Formula used:

For a given polynomial ax2 + bx + c

Min/Max value of a polynomial = c – b2/4a or (4ac – b2)/4a

Calculation:

For polynomial –x2 – 8x + 7,

Value of a = –1, b = –8, and c = 7

Maximum value of the polynomial = c – b2/4a

⇒ Maximum value of the polynomial = 7 – (–8)2/(4 × (–1)

⇒ Maximum value of the polynomial = 7 + 64/4

⇒ Maximum value of the polynomial = 7 + 16

Maximum value of –x2 – 8x + 7 is 23



Discussion

No Comment Found

Related InterviewSolutions