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# If x = -3, what is the value of -3x^2 ?

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Math Expert
Joined: 02 Sep 2009
Posts: 51185
If x = -3, what is the value of -3x^2 ?  [#permalink]

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01 Oct 2018, 00:56
00:00

Difficulty:

5% (low)

Question Stats:

84% (00:14) correct 16% (00:17) wrong based on 67 sessions

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If x = -3, what is the value of -3x^2 ?

A. -27
B. -18
C. 18
D. 27
E. 81

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Re: If x = -3, what is the value of -3x^2 ?  [#permalink]

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01 Oct 2018, 01:08
x = -3. $$x^2$$ = $$(-3)^2$$ = 9.

-3$$x^2$$ = -3*9 = -27

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Re: If x = -3, what is the value of -3x^2 ?  [#permalink]

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01 Oct 2018, 02:01
Bunuel wrote:
If x = -3, what is the value of -3x^2 ?

A. -27
B. -18
C. 18
D. 27
E. 81

$$-3x^2 = (-3)*(-3)^2 = (-3)*(9) = -27$$

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Re: If x = -3, what is the value of -3x^2 ? &nbs [#permalink] 01 Oct 2018, 02:01
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