Question

3. Find the value of :
(i) 2x2 – 3x + 4 when x = 2
(iii) 3x3 + 9x2 - x + 8 when x = -2​

Answer 1

Answer:

(I) 4-3x2+4

4-6+4=-2+4=2

Answer 2

Step-by-step explanation:

(i) 2x^2 -3x + 4 when x = 2

2(2)^2 -3(2) + 4

2(4) - 6 + 4

8 - 6 + 4

12 - 6

6

(ii) 3x^3 + 9x^2 - x + 8 when x = -2

3(-2)^3 + 9(-2)^2 - (-2) + 8

3(-8) + 9(4) + 2 + 8

-24 + 36 +2+8

46-24

22

Hope it helps you!!