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

(8x^(-15)y^(18))^(-(5)/(3))
Answer:

Simplify the following expression to simplest form using only positive exponents.\newline(8x15y18)53 \left(8 x^{-15} y^{18}\right)^{-\frac{5}{3}} \newlineAnswer:

Full solution

Q. Simplify the following expression to simplest form using only positive exponents.\newline(8x15y18)53 \left(8 x^{-15} y^{18}\right)^{-\frac{5}{3}} \newlineAnswer:
  1. Apply negative exponent rule: Apply the negative exponent rule to the entire expression.\newlineThe negative exponent rule states that an=1ana^{-n} = \frac{1}{a^n}. We will apply this rule to the entire expression (8x15y18)53(8x^{-15}y^{18})^{-\frac{5}{3}}.
  2. Distribute exponents to factors: Distribute the exponent to each factor inside the parentheses.\newlineWhen raising a power to a power, you multiply the exponents. In this case, we have a product inside the parentheses, so we will distribute the exponent to each factor.\newline(8(5)/(3))(x15)(5)/(3)(y18)(5)/(3)(8^{-(5)/(3)}) \cdot (x^{-15})^{-(5)/(3)} \cdot (y^{18})^{-(5)/(3)}
  3. Multiply exponents for each factor: Multiply the exponents for each factor.\newlineNow we multiply the exponents for each factor.\newline8(5/3)8^{(-5/3)} becomes 8(5/3)8^{(5/3)} because the negative sign is canceled by the negative exponent outside.\newlinex(155/3)x^{(-15 \cdot -5/3)} becomes x(75/3)x^{(75/3)} because 155/3-15 \cdot -5/3 is 75/375/3.\newliney(185/3)y^{(18 \cdot -5/3)} becomes y(30)y^{(-30)} because 185/318 \cdot -5/3 is 30-30.
  4. Simplify exponents: Simplify the exponents. Simplify the exponents by dividing 7575 by 33 for the xx term and by recognizing that y(30)y^{(-30)} can be written with a positive exponent by taking its reciprocal. 8(5/3)8^{(5/3)}, x(75/3)x^{(75/3)} becomes x25x^{25}, y(30)y^{(-30)} becomes 1/(y30)1/(y^{30})
  5. Write with positive exponents: Write the expression with only positive exponents.\newlineWe want to express everything with positive exponents, so we will write y30y^{-30} as its reciprocal.\newline85/3x251/(y30)8^{5/3} * x^{25} * 1/(y^{30})
  6. Simplify 85/38^{5/3}: Simplify the expression for 85/38^{5/3}. 88 is 232^3, so we can rewrite 85/38^{5/3} as (23)5/3(2^3)^{5/3}. When raising a power to a power, we multiply the exponents. (23)5/3=23(5/3)=25(2^3)^{5/3} = 2^{3*(5/3)} = 2^5
  7. Combine simplified terms: Combine all the simplified terms.\newlineNow we combine all the terms to get the final expression.\newline25×x25/y302^5 \times x^{25} / y^{30}
  8. Calculate 252^5: Calculate the value of 252^5. 252^5 is 22 multiplied by itself 55 times, which equals 3232. 32×x25/y3032 \times x^{25} / y^{30}

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