# The value of the polynomial 5x - 4x² + 3, when x = -1 is

a. -6

b. 6

c. 2

d. -2

**Solution:**

It is given that

p(x) = 5x - 4x² + 3

We have to find the value when x = -1

p(-1) = 5(-1) - 4(-1)² + 3

By further calculation

p(-1) = -5 - 4 + 3

So we get

p(-1) = -9 + 3

p(-1) = -6

Therefore, the value is -6.

**✦ Try This: **The value of the polynomial 3x - 5x² + 2, when x = -2 is

It is given that

p(x) = 3x - 5x² + 2

We have to find the value when x = -2

p(-2) = 3(-2) - 5(-2)² + 2

By further calculation

p(-2) = -6 - 20 + 2

So we get

p(-2) = -26 + 2

p(-2) = -24

Therefore, the value is -24.

**☛ Also Check: **NCERT Solutions for Class 9 Maths Chapter 2

**NCERT Exemplar Class 9 Maths Exercise 2.1 Problem 6**

## The value of the polynomial 5x - 4x² + 3, when x = -1 is a. -6, b. 6, c. 2, d. -2

**Summary:**

The terms of polynomials are defined as the parts of the expression that are separated by the operators "+" or "-". The value of the polynomial 5x - 4x² + 3, when x = -1 is -6

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