Question

Find the value of the polynomial 5x – 4x2 + 3 at
(i) x = 0
(ii) x = – 1
(iii) x = 2
​

Answer 1

Answer:

X=o

X=-1

X=2

this is answer

Answer 2

Given :

• 5x – 4x² + 3  

To find :

• the value of the polynomial 5x – 4x² + 3 at

(i) x = 0 , (ii) x = – 1 , and (iii) x = 2.

Solution :

⇒ Let's find the value.

✳ 5x – 4x² + 3 at  x = 0

→ 5x – 4x² + 3

→ (5 × 0) – 4 × 0² + 3

→ 0 – 4 × 0 + 3

→ 0 – 0 + 3

→ 0 + 3

→ 3  

• Therefore, the value of the polynomial 5x – 4x2 + 3 at  x = 0 is 3.

✳ 5x – 4x² + 3 at  x = -1

→ 5x – 4x² + 3

→ 5 × (-1) – 4 × (-1)² + 3

→ -5 – 4 × (-1)² + 3

→ -5 – 4 × 1 + 3

→ -9 × 1 + 3

→ -9 + 3

→ -6

• Therefore, the value of the polynomial 5x – 4x2 + 3 at  x = 0 is -6.

✳ 5x – 4x² + 3 at  x = 2

→ 5x – 4x² + 3

→ 5 × 2 – 4 × (2)² + 3

→ 5 × 2 – (4 × 4) + 3

→ 5 × 2 – 16 + 3

→ 10 – 16 + 3

→ -6 + 3

→ -3

• Therefore, the value of the polynomial 5x – 4x2 + 3 at  x = -3 is -3.