How to do this question

8

Step-by-step explanation:

First you see which rule applies to 3

3 is not less than 0

3 is not in between 0 and 3, when 3 is not inclusive

But 3 is less than or equal to 3

That means you do the third operation : x² - 1

3² - 1 = 9 - 1 = 8

The answer is 8

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-Chetan K

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

b

step-by-step explanation: