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Simplify the following expression to simplest form using only positive exponents.

(64x^(-18)y^(21))^((5)/(3))
Answer:

Simplify the following expression to simplest form using only positive exponents.\newline(64x18y21)53 \left(64 x^{-18} y^{21}\right)^{\frac{5}{3}} \newlineAnswer:

Full solution

Q. Simplify the following expression to simplest form using only positive exponents.\newline(64x18y21)53 \left(64 x^{-18} y^{21}\right)^{\frac{5}{3}} \newlineAnswer:
  1. Apply Power Rule: Apply the power to each factor inside the parentheses.\newlineWe have the expression (64x18y21)53(64x^{-18}y^{21})^{\frac{5}{3}}. According to the properties of exponents, when we have a power raised to another power, we multiply the exponents. We will apply this rule to each factor inside the parentheses separately.\newline645364^{\frac{5}{3}} * x1853x^{-18 * \frac{5}{3}} * y2153y^{21 * \frac{5}{3}}
  2. Calculate Exponent for xx: Calculate the exponent for xx. We need to multiply the exponent of xx, which is 18-18, by 53\frac{5}{3}. x(18×53)=x30x^{(-18 \times \frac{5}{3})} = x^{-30}
  3. Calculate Exponent for y: Calculate the exponent for y.\newlineWe need to multiply the exponent of y, which is 2121, by 5/35/3.\newliney(21×5/3)=y35y^{(21 \times 5/3)} = y^{35}
  4. Simplify Exponent for 6464: Simplify the exponent for 6464.\newlineWe need to calculate 6464 raised to the power of 53\frac{5}{3}. Since 6464 is 434^3, we can rewrite this as (43)53(4^3)^{\frac{5}{3}}.\newline(43)53=4353=45(4^3)^{\frac{5}{3}} = 4^{3 \cdot \frac{5}{3}} = 4^5
  5. Calculate 454^5: Calculate 44 raised to the power of 55. We need to calculate 454^5. 45=4×4×4×4×4=10244^5 = 4 \times 4 \times 4 \times 4 \times 4 = 1024
  6. Rewrite with Positive Exponents: Rewrite the expression with positive exponents.\newlineWe have x30x^{-30}, which has a negative exponent. To make the exponent positive, we take the reciprocal of the base and change the sign of the exponent.\newlinex30=1x30x^{-30} = \frac{1}{x^{30}}\newlineNow, we can rewrite the expression with only positive exponents:\newline1024×(1x30)×y351024 \times \left(\frac{1}{x^{30}}\right) \times y^{35}
  7. Combine for Final Expression: Combine all the parts to write the final simplified expression.\newlineThe final simplified expression is:\newline1024y35/x301024 \cdot y^{35} / x^{30}

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