Question

The value of the polynomial 5x – 4x² + 3, when x = –1 is ______.

विकल्प

• – 6

• 6

• 2

• –2

Answer 1

The value of the polynomial 5x – 4x² + 3, when x = –1 is 6.

Explanation:

Let f(x) = 5x – 4x² + 3

The value of f(–1) will be

f(–1) = 5 × (–1) – 4 × (–1)² + 3

= –5 – 4 + 3

= –9 + 3

= 6