Class 7 Maths Chapter 12 (Exercise-12.3)

Here you will find answers to the exercise 12.3.

1. If m = 2, find the value of:

class 7 maths ex-12.3 question 1

2. If p = -2, find the value of:

class 7 maths ex-12.3 question 2

3. Find the value of the following expressions, when x = -1:

class 7 maths ex-12.3 question 3

4. If a = 2, b = -2, find the value of :

class 7 maths ex-12.3 question 4

5. When a = 0, b = -1, find the value of the given expressions:

class 7 maths ex-12.3 question 5

6. Simplify the expressions and find the value if x is equal to 2

class 7 maths ex-12.3 question 6

7. Simplify these expressions and find their values if x = 3, a = -1, b = -2.

class 7 maths ex-12.3 question 7

8. (i) If z = 10, find the value of z3 – 3(z – 10).

class 7 maths ex-12.3 question 8(i)

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

class 7 maths ex-12.3 question 8(ii)

9. What should be the value of a if the value of 2x2 + x -a equals to 5, when x = 0 ?

class 7 maths ex-12.3 question 9

10. Simplify the expression and find its value when a = 5 and b = -3. 2(a2 + ab) + 3 – ab

class 7 maths ex-12.3 question 10

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