Q. Simplify the following expression to simplest form using only positive exponents.(8x−3y−21)32Answer:
Apply Power to Factors: Apply the power to each factor inside the parentheses.To simplify the expression (8x−3y−21)32, we need to apply the exponent of 32 to each factor inside the parentheses. This means we will raise 8 to the power of 32, x to the power of −3⋅32, and y to the power of −21⋅32.
Simplify Exponents: Simplify the exponents.Raising 8 to the power of 32 means we are looking for the cube root of 8 squared. For x and y, we multiply the exponents by 32, which simplifies the negative exponents.832=(23)32=23∗(32)=22=4x−3∗(32)=x−2y−21∗(32)=y−14
Convert Negative Exponents: Convert negative exponents to positive exponents.To express the expression using only positive exponents, we take the reciprocal of the base for the negative exponents.x−2=x21y−14=y141
Combine Results: Combine the results.Now we combine the results from the previous steps to write the expression with positive exponents only.4×(x21)×(y141)=x2×y144
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