Question: If x = -3, what is the Value of -3x^2?

(A) -27
(B) -18
(C) 18
(D) 27
(E) 81

Correct Answer:(A)

Solution and Explanation:
Approach Solution 1:

The problem statement informs that:

Given:

• x = -3

Find Out:

• The value of -3x^2

x=−3

Therefore, —3x^2 = —3(−3)^2
= —3∗9
= —27

Approach Solution 2:

The problem statement states that:

Given:

• x = -3

Find Out:

• The value of -3x^2

Since x=−3
Therefore in the next step, we can write, x^2=9
Thus it can be inferred that the value of −3x^2 =−27

Approach Solution 3:

The problem statement states that:

Given:

• x = -3

Find Out:

• The value of -3x^2

As we all know that the square of any number is positive, and multiplied by a negative number will give a negative number.

Therefore, the value of the expression — 3x^2 = −3* 9 [since x= -3 and (-3)^2 = 9]
= -27

“If x = -3, what is the value of -3x^2?''- is a topic of the GMAT Quantitative reasoning section of the GMAT exam. GMAT Problem Solving questions assess the candidates’ efficiency in evaluating information to solve quantitative problems. GMAT Quant practice papers cite numerous quantitative problems that will further polish up the calculative skills of the candidates.

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