# ML Aggarwal CBSE Solutions Class 7 Math Fifth Chapter Algebraic Expressions Exercise 5.3

### 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) 3m2 – 2m – 7

(iv) 5/2 m – 4

Solution 01 Number:

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

(i) 4p + 7

(ii) -3p2 + 4p + 7

(iii) -2p3 – 3p2 + 4p + 7

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

(i) a2 + b2

(ii) a2 + ab + b2

(iii) a2 – b2

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

(i) 2a2 + b2 + 1

(ii) a2 + ab + 2

(iii) 2a2b + 2ab2 + ab

(5) If p = -10, find the value of p2 – 2p – 100

Solution 02, 03, 04, 05 Number:

(6) If z = 10, find the value of z3 – 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(a2 + ab) + 3 – ab.

Solution 06, 07, 08 Number:

Updated: January 7, 2020 — 11:52 am