# Example 4 - Chapter 13 Class 7 Exponents and Powers

Last updated at Dec. 18, 2018 by Teachoo

Last updated at Dec. 18, 2018 by Teachoo

Transcript

Example 4 Expand a3 b2, a2 b3, b2 a3, b3 a2. Are they all same? a3 b2 = a3 × b2 = a × a × a × b × b a2 b3 = a2 × b3 = a × a × b × b b2 a3 = b2 × a3 = b × b × a × a × a = a × a × a × b × b b3 a2 = b3 × a2 = b × b × b × a × a = a × a × b × b × b Now, a3 b2 & b2 a3 (= a3 b2) are the same As they have same power of a & b Similarly, a2 b3 & b3 a2 (= a2 b3) are the same As they have same powers of a and b But all of them are not equal

Examples

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Example 4 You are here

Example 5 (i) Important

Example 5 (ii)

Example 5 (iii)

Example 5 (iv)

Example 6

Example 7

Example 8 (i)

Example 8 (ii)

Example 8 (iii)

Example 9 (i)

Example 9 (ii)

Example 10

Example 11 (i) Important

Example 11 (ii)

Example 11 (iii)

Example 11 (iv)

Example 11 (v)

Example 12 (i) Important

Example 12 (ii)

Example 12 (iii)

Example 13 (i)

Example 13 (ii)

Example 13 (iii)

Example 13 (iv)

About the Author

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.