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# If m = 2, find the value of:

(i) m - 2 (ii) 3m - 5 (iii) 9 - 5m (iv) 3m^{2} - 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) 3m^{2} - 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) 3m^{2} - 2m - 7 = 1 (v) (5m/2) - 4 = 1

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