Simplify (7×2)^9 ÷ (2×7)^2: Expression with Different Exponents

Question

Insert the corresponding expression:

(7×2)9(2×7)2= \frac{\left(7\times2\right)^{9}}{\left(2\times7\right)^2}=

Video Solution

Solution Steps

00:00 Solve
00:03 In multiplication, the order of factors doesn't matter
00:06 We will use this formula in our exercise and switch between the factors
00:16 According to the laws of exponents, division of exponents with equal bases (A)
00:20 equals the same base (A) raised to the power of the difference of exponents (M-N)
00:23 We will use this formula in our exercise
00:26 And this is the solution to the question

Step-by-Step Solution

To solve the given expression (7×2)9(2×7)2 \frac{\left(7\times2\right)^{9}}{\left(2\times7\right)^2} , we will apply the Power of a Quotient Rule for Exponents. This rule states that aman=amn \frac{a^m}{a^n} = a^{m-n} .

The base of the exponents in both the numerator and the denominator is the same, 7×2 7 \times 2 or equivalently 2×7 2 \times 7 .

1. First, note that the structure is (7×2)9(7×2)2 \frac{(7\times2)^9}{(7\times2)^2} .

2. Using the Power of a Quotient Rule: (7×2)9(7×2)2=(7×2)92 \frac{(7\times2)^9}{(7\times2)^2} = (7\times2)^{9-2}

3. Simplify the expression in the exponent: 92=7 9 - 2 = 7

4. Therefore, the simplified expression is \(7×2)7 (7\times2)^7

The solution to the question is: (7×2)92 (7\times2)^{9-2}

Answer

(7×2)92 \left(7\times2\right)^{9-2}