Question

2.
3x(x2 - x + 1) -1 and find its values for (i) x= -1 (ii) x = 0 (iii) x = 1.
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Answer 1

Answer :

Equation ⤵

$3x(x2 - x + 1) - 1$

(i) x = -1

3x(x2 - x + 1) - 1

After adding values

3 × -1 - (1 × 2 - (-1) + 1) - 1

- 3 - 1 - (2 + 1 + 1) - 1

- 4 - 2 - 1 - 1 - 1

- 9

(ii) x = 0

3x(x2 - x + 1) - 1

After adding values

3 × 0 (0 × 2 - 0 + 1) - 1

0 × 0 - 0 + 1 - 1

0 - 0

0

(iii) x = 1

3x(x2 - x + 1) - 1

After adding values

3 × 1 (1 × 2 - 1 + 1) - 1

3 × 2 - 1

6 - 1

5