Check sibling questions

Example 3 - State with reasons, which  pairs of terms are of like and

Example 3 - Chapter 12 Class 7 Algebraic Expressions - Part 2
Example 3 - Chapter 12 Class 7 Algebraic Expressions - Part 3
Example 3 - Chapter 12 Class 7 Algebraic Expressions - Part 4
Example 3 - Chapter 12 Class 7 Algebraic Expressions - Part 5
Example 3 - Chapter 12 Class 7 Algebraic Expressions - Part 6
Example 3 - Chapter 12 Class 7 Algebraic Expressions - Part 7


Transcript

Example 3 State with reasons, which of the following pairs of terms are of like terms and which are of unlike terms: (i) 7x, 12y 7x, 12y 7x has variable x 12y has variable y 7x and 12y have different variables So they are unlike terms Example 3 State with reasons, which of the following pairs of terms are of like terms and which are of unlike terms: (ii) 15π‘₯, –21x 15π‘₯, –21π‘₯ 15π‘₯ has variable π‘₯ βˆ’21π‘₯ has variable π‘₯ 15π‘₯ and βˆ’21π‘₯ have some variable π‘₯ So, they are like terms Example 3 State with reasons, which of the following pairs of terms are of like terms and which are of unlike terms: (iii) – 4ab, 7ba βˆ’4ab, 7ba βˆ’4ab has variable ab 7ba has variable ba i.e. ab (∡ ba = ab) Hence, βˆ’4ab and 7ba have some variable ab So, they are like terms Example 3 State with reasons, which of the following pairs of terms are of like terms and which are of unlike terms: (iv) 3xy, 3x 3π‘₯y, 3π‘₯ 3π‘₯y has variable xy 3π‘₯ has variable y Since 3π‘₯y and 3π‘₯ have different variables. So, they are unlike terms. Example 3 State with reasons, which of the following pairs of terms are of like terms and which are of unlike terms: (v) 6π‘₯y2, 9x2y 6π‘₯y2, 9x2y 6π‘₯y2 has variable xy2 9x2y has variable π‘₯2y Since 6π‘₯y2 and 9π‘₯y2 have different variables So, they are unlike terms. Example 3 State with reasons, which of the following pairs of terms are of like terms and which are of unlike terms: (vi) pq2, – 4pq2 pq2, – 4pq2 pq2 has variable pq2 βˆ’4pq2 has variable pq2 Since pq2 and βˆ’4pq2 have same variable pq2 So, they are like terms. Example 3 State with reasons, which of the following pairs of terms are of like terms and which are of unlike terms: (vii) mn2, 10mn mn2, 10mn mn2 has variable mn2 10mm has variable mn Since mn2 and 10mm have different variables So, they are unlike terms.

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Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.