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If x ≥ −3, which statement is correct after multiplying both sides by −2?

Answer and explanation

Correct answer: −2x ≤ 6

The governing concept is reversal of the inequality sign under multiplication by a negative number. Starting with x ≥ −3, multiply both sides by −2. Because −2 is negative, the direction changes from ≥ to ≤. The right side becomes (−3)(−2) = 6, so the result is −2x ≤ 6. Therefore option B is correct. Option A keeps the original direction and is the standard sign-reversal error. Option C changes the coefficient to positive 2 even though the multiplier is −2. Option D correctly has a negative coefficient and a reversed sign but calculates the right-hand product incorrectly. A test value such as x = 0 satisfies the original inequality and gives 0 ≤ 6, confirming the result.

Related tags

Linear InequalitiesNegative MultiplicationSign ReversalIntroduction To InequalitiesMathematicsClass 11 Mcq

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