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What is the value of the expression 3a^{2} - 4|a| + 6 when a = -3?

1) -24

2) -9

3) 21

4) 45

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3a^{2} - 4|a| + 6

when a = -3,

3(-3)^{2} - 4|-3| + 6

Since the sign, || represent absolute value (Absolute values are non-negative values regardless of its sign), thus, the expresion becomes:

3(9) - 4(3) + 6

= 27 - 13 + 6

= 21

**Ans 3**

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