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What is the value of the expression 3a^2 - 4|a| + 6 when a = -3?
JMAP math expression
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What is the value of the expression 3a2 - 4|a| + 6 when a = -3?

1) -24

2) -9

3) 21

4) 45

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peter
Asked by peterrep:904
University of Lagos Nigeria
24 June 2020

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judziy
Judziy answeredrep:874
University of Benin Nigeria
24 June 2020
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3a2 - 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

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