Q. Express the following fraction in simplest form, only using positive exponents.12x−6k−8(4x−5k3)−5Answer:
Write Expression, Identify Exponents: Write down the given expression and identify the negative exponents.The given expression is 12x−6k−8(4x−5k3)−5.We need to simplify this expression and express it with only positive exponents.
Apply Negative Exponent Rule: Apply the negative exponent rule to the numerator.The negative exponent rule states that a−n=an1. We will apply this rule to the entire numerator.((4x−5k3)−5) becomes ((4x−5k3)51).
Simplify Denominator: Simplify the denominator by applying the negative exponent rule.The negative exponent rule will also be applied to each term in the denominator.12x(−6)k(−8) becomes x6k812.
Combine Numerator and Denominator: Combine the numerator and denominator.Now we have ((4x−5k3)51)/(x6k812).This can be rewritten as (45x−25k151)∗(12x6k8).
Multiply Terms: Simplify the expression by multiplying the terms. We multiply the numerators and the denominators separately. This gives us (x6k8)/(45x−25k15×12).
Simplify Powers and Combine: Simplify the powers of 4 and combine like terms.45 is 1024. We also add the exponents of like bases.This results in (x6−(−25)k8−15)/(1024×12).
Perform Exponent Arithmetic: Perform the exponent arithmetic and simplify the fraction.Adding the exponents of x and subtracting the exponents of k gives us x31k−7.Simplify 1024×12 to get 12288.The expression is now 12288x31k−7.
Apply Negative Exponent Rule: Apply the negative exponent rule to k−7 to make the exponent positive.k−7 becomes k71.The final expression is 12288k7x31.
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