Q. Simplify the following expression to simplest form using only positive exponents.(8x−15y18)−35Answer:
Apply negative exponent rule: Apply the negative exponent rule to the entire expression.The negative exponent rule states that a−n=an1. We will apply this rule to the entire expression (8x−15y18)−35.
Distribute exponents to factors: Distribute the exponent to each factor inside the parentheses.When 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.(8−(5)/(3))⋅(x−15)−(5)/(3)⋅(y18)−(5)/(3)
Multiply exponents for each factor: Multiply the exponents for each factor.Now we multiply the exponents for each factor.8(−5/3) becomes 8(5/3) because the negative sign is canceled by the negative exponent outside.x(−15⋅−5/3) becomes x(75/3) because −15⋅−5/3 is 75/3.y(18⋅−5/3) becomes y(−30) because 18⋅−5/3 is −30.
Simplify exponents: Simplify the exponents. Simplify the exponents by dividing 75 by 3 for the x term and by recognizing that y(−30) can be written with a positive exponent by taking its reciprocal. 8(5/3), x(75/3) becomes x25, y(−30) becomes 1/(y30)
Write with positive exponents: Write the expression with only positive exponents.We want to express everything with positive exponents, so we will write y−30 as its reciprocal.85/3∗x25∗1/(y30)
Simplify 85/3: Simplify the expression for 85/3. 8 is 23, so we can rewrite 85/3 as (23)5/3. When raising a power to a power, we multiply the exponents. (23)5/3=23∗(5/3)=25
Combine simplified terms: Combine all the simplified terms.Now we combine all the terms to get the final expression.25×x25/y30
Calculate 25: Calculate the value of 25. 25 is 2 multiplied by itself 5 times, which equals 32. 32×x25/y30
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