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For \(x\ne0\), what is the simplest form of \(\frac{(4x^{-1})^{2}(3x^{3})^{2}}{12x^{4}}\)?

Answer and explanation

Correct answer: \(12\)

We have \((4x^{-1})^2=16x^{-2}\) and \((3x^3)^2=9x^6\). Thus, the numerator becomes \(16x^{-2}\cdot9x^6=144x^4\). Therefore, \(\frac{144x^4}{12x^4}=12\), since \(x^4\) cancels for \(x\ne0\). Options B and C retain unnecessary powers of \(x\), while option D is only the numerator. Exam tip: when multiplying like bases, add their exponents; when dividing, subtract them.

Related tags

Laws Of ExponentsMonomial OperationsPolynomial AlgebraOperations On Real Numbers And The Laws Of ExponentsPolynomialsMathematicsClass 10 Mcq

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