If m = 2, find the value of:
(i) m - 2   (ii) 3m - 5   (iii) 9 - 5m   (iv) 3m² - 2m - 7
(v) (5m / 2) - 4

Solution:

Let us find the value of the given expressions by substituting the value of m as 2.

(i) m - 2

= 2 - 2

= 0 is the required value.

(ii) 3m - 5

= 3 × 2 - (5)

= 6 - 5

= 1 is the required value

(iii) 9 - 5m

= 9 - (5× 2)

= 9 - 10

= -1 is the required value

(iv) 3m² - 2m - 7

= 3(2)² - (2 × 2) - 7

= 3 × 2 × 2 - (4) - 7

= 12 - 4 - 7

= 1 is the required value

(v) (5m/2) - 4

= [(5 × 2) / 2] - 4

= (10/2) - 4

= 5 - 4

= 1 is the required value

☛ Check: NCERT Solutions Class 7 Maths Chapter 12

---

Video Solution:

If m = 2, find the value of: (i) m - 2 (ii) 3m - 5 (iii) 9 - 5m (iv) 3m² - 2m - 7 (v) (5m/2) - 4

Maths NCERT Solutions Class 7 Chapter 12 Exercise 12.3 Question 1

Summary:

If m = 2, the value of: (i) m - 2 = 0 (ii) 3m - 5 = 1 (iii) 9 - 5m = -1 (iv) 3m² - 2m - 7 = 1 (v) (5m/2) - 4 = 1

---

☛ Related Questions:

• If P 2 Find The Value Of I 4p 7 Ii 3p2 4p 7 Iii 2p3 3p2 4p 7
• Find The Value Of The Following Expressions When X 1 I 2x 7 Ii X 2 Iii X2 2x 1 Iv 2x2 X 2
• If A 2 B 2 Find The Value Of I A2 B2 Ii A2 Ab B2 Iii A2 B2
• When A 0 B 1 Find The Value Of The Given Expressions I 2a 2b Ii 2a2 B2 1 Iii 2a2b 2ab2 Ab Iv A2 Ab 2