Q. Which expression is equivalent to 36×66?Choices:(A) 1861(B) 1812(C) 186(D) 1836
Identify Bases and Exponents: Identify the bases and the exponents in the expression 36×66. We have two terms, 36 and 66, with bases 3 and 6, and both raised to the exponent 6.
Prime Factors of 6: Recognize that 6 can be written as a product of its prime factors.The number 6 is equal to 2×3. Therefore, 66 can be rewritten as (2×3)6.
Power of a Product Rule: Apply the power of a product rule to (2×3)6. According to the power of a product rule, (ab)n=an×bn. So, (2×3)6=26×36.
Substitute and Combine Terms: Substitute 66 with 26×36 in the original expression.Now we have 36×66=36×(26×36).
Combine Like Terms: Combine like terms by adding the exponents of the same base.We have two terms with the base 3, so we add their exponents: 36×36=36+6=312.
Multiply Remaining Terms: Multiply the remaining terms.Now we have 312×26. Since these terms do not have the same base, we cannot combine them further.
Power of a Power Rule: Recognize that 312 can be written as (36)2. Using the power of a power rule, (an)m=an∗m, we have (36)2=36∗2=312.
Combine Expressions: Combine the expressions (36)2 and 26. Now we have (36)2×26=312×26.
Rearrange Terms: Recognize that 312×26 can be written as (36×26)×36. We can rearrange the terms to group them as (36×26)×36.
Substitute Back Expression: Substitute back the expression for 66. We know that 66=26×36, so we can write (36×26)×36 as 66×36.
Full Circle to Original: Recognize that we have come full circle to the original expression.We have shown that 36×66=66×36, which is the same as the original expression.
Simplify the Expression: Simplify the expression 66×36.Since 66=(2×3)6, we can write 66×36 as (2×3)6×36=26×312.
Correct Mistake: Recognize that we have made a mistake in the previous steps.We have incorrectly circled back to the original expression without simplifying it correctly. We need to correct this mistake.
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