Simplify Powers of 2: Solving 2³ × 2⁴ ÷ 2⁵

Question

Solve the following exercise:

232425= \frac{2^3\cdot2^4}{2^5}=

Video Solution

Solution Steps

00:00 Simplify the expression
00:04 When multiplying powers with equal bases
00:07 The power of the result equals the sum of the powers
00:11 We'll use this formula in our exercise, and add the powers
00:20 When dividing powers with equal bases
00:23 The power of the result equals the difference of the powers
00:28 We'll use this formula in our exercise, and subtract the powers
00:35 And this is the solution to the question

Step-by-Step Solution

In order to simplify the given expression, we will use the following two laws of exponents:

a. Law of exponents for multiplication of terms with identical bases:

aman=am+n a^m\cdot a^n=a^{m+n}

b. Law of exponents for division of terms with identical bases:

aman=amn \frac{a^m}{a^n}=a^{m-n}

Let's solve the given expression:

232425= \frac{2^3\cdot2^4}{2^5}= First, since in the numerator we have multiplication of terms with identical bases, we'll use the law of exponents mentioned in a:

232425=23+425=2725= \frac{2^3\cdot2^4}{2^5}= \\ \frac{2^{3+4}}{2^5}=\\ \frac{2^{7}}{2^5}=\\ We'll continue, since we have division of terms with identical bases, we'll use the law of exponents mentioned in b:

2725=275=22=4 \frac{2^{7}}{2^5}=\\ 2^{7-5}=\\ 2^2=\\ \boxed{4}

Let's summarize the simplification of the given expression:

232425=2725=22=4 \frac{2^3\cdot2^4}{2^5}= \\ \frac{2^{7}}{2^5}=\\ 2^2=\\ \boxed{4}

Therefore, the correct answer is answer d.

Answer

4 4