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:
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