**ML Aggarwal CBSE Solutions Class 7 Math 5th Chapter Algebraic Expressions Exercise 5.3**

**(1) if m = 2, find the value of:**

(i) 3m – 5

(ii) 9 – 5m

(iii) 3m^{2} – 2m – 7

(iv) 5/2 m – 4

**Solution 01 Number:**

**(2) if p = -2, find the value of:**

(i) 4p + 7

(ii) -3p^{2} + 4p + 7

(iii) -2p^{3} – 3p^{2} + 4p + 7

**(3) If a = 2, b = -2, find the value of:**

(i) a^{2} + b^{2}

(ii) a^{2} + ab + b^{2}

(iii) a^{2} – b^{2}

**(4) When a = 0, b = -1, find the value of the given expressions:**

(i) 2a^{2} + b^{2} + 1

(ii) a^{2} + ab + 2

(iii) 2a^{2}b + 2ab^{2} + ab

**(5) If p = -10, find the value of p ^{2} – 2p – 100**

**Solution 02, 03, 04, 05 Number:**

**(6) If z = 10, find the value of z ^{3} – 3(z – 10)**

**(7) Simplify the following expressions and find their values when x = 2:**

(i) x + 7 + 4(x – 5)

(ii) 3(x + 2) + 5x – 7

(iii) 6x + 5(x – 2)

(iv) 4(2x – 1) + 3x + 11

**(8) Simplify the following expressions and find the values when a = -1, b = -2:**

(i) 2a – 2b – 4 -5 + a

(ii) 2(a^{2} + ab) + 3 – ab.

**Solution 06, 07, 08 Number:**

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