Q. Simplify the following expression to simplest form using only positive exponents.(9x8y−12)−21Answer:
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 expression (9x8y−12)−21.
Rewrite with Positive Exponent: Rewrite the expression with a positive exponent by taking the reciprocal.(9x8y−12)−(1)/(2) becomes (9x8y−12)1/21
Apply Power of Power Rule: Apply the power of a power rule.The power of a power rule states that (am)n=am∗n. We will apply this rule to each part of the expression inside the parentheses.(921)(x8∗21)(y−12∗21)1
Simplify Exponents: Simplify the exponents.Calculate the new exponents by multiplying the exponents.(921)(x4)(y−6)1
Simplify Square Root: Simplify the square root of 9. The square root of 9 is 3. (3)(x4)(y−6)1
Rewrite Negative Exponent: Rewrite the negative exponent as a positive exponent in the denominator.The negative exponent rule states that a−n=an1. We will apply this rule to y−6.(3)(x4)(y61)1
Simplify Expression: Simplify the expression by multiplying the denominators.When we multiply fractions, we multiply the numerators and the denominators separately.(3)(x4)1∗(y6)
Combine Denominator: Combine the terms in the denominator.Since 3 and x4 are already in the denominator, we just need to multiply them by y6.(3x4y6)1
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