ML Aggarwal Class 7 Solutions for ICSE Maths Chapter 8 Algebraic Expressions Ex 8.3

ML Aggarwal Class 7 Solutions Chapter 8 Algebraic Expressions Ex 8.3 for ICSE Understanding Mathematics acts as the best resource during your learning and helps you score well in your exams.

ML Aggarwal Class 7 Solutions for ICSE Maths Chapter 8 Algebraic Expressions Ex 8.3

Question 1.
If m = 2, find the value of:
(i) 3m – 5
(ii) 9 – 5m
(iii) 3m² – 2m – 1
(iv) \(\frac { 5 }{ 2 }\) m – 4
Solution:

Question 2.
If p = – 2, find the value of:
(1) 4p + 7
(ii) -3p² + 4p + 7
(iii) -2p³ – 3p² + 4p + 7
Solution:

Question 3.
If a = 2, b = -2, find the value of:
(i) a² + b²
(ii) a² + ab + b²
(iii) a² – b²
Solution:

Question 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
Solution:

Question 5.
If p = -10, find the value of p² – 2p – 100.
Solution:

Question 6.
If z = 10, find the value of z³ – 3(z – 10).
Solution:

Question 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
Solution:

Question 8.
Simplify the following expressions and find their values when a = -1, b = -2:
(i) 2a – 2b – 4 – 5 + a
(ii) 2(a² + ab) + 3 – ab
Solution: