Selina Solutions Concise Maths Class 10 Chapter 9 Matrices

Selina Solutions Concise Maths Class 10 Chapter 9 Matrices

Salina Maths class 10 solutions Class 10 Chapter 9 Matrices have been provided to you through an online medium, using which you can understand the difficult questions of ICSE Class 10 Mathematics, and can prepare for the upcoming Board exam.

Selina Class 10 ICSE solution will give strength to you and the board will also clear the exam, Mathematics Subject demands time and practice, then keep practicing and you will definitely get success.

Exercise 9(A) Solutions

Exercise 9(B) Solutions

Exercise 9(C) Solutions

Exercise 9(D) Solutions

Selina Solutions Concise Maths Class 10 Chapter 9 Matrices Exercise 9(B)

Question 1. Evaluate:

(i) 3[5 -2]

Solution:

3[5 -2] = [3×5 3x-2] = [15 -6]

(ii) 

Solution:

(iii) 

Solution:

(iv) 

Solution:

Question 2. Find x and y if:

(i) 3[4 x] + 2[y -3] = [10 0]

Solution:

Taking the L.H.S, we have

3[4 x] + 2[y -3] = [12 3x] + [2y -6] = [(12 + 2y) (3x – 6)]

Now, equating with R.H.S we get

[(12 + 2y) (3x – 6)] = [10 0]

12 + 2y = 10 and 3x – 6 = 0

2y = -2 and 3x = 6

y = -1 and x = 2

(ii) 

Solution:

We have,

So, equating the matrices we get

-x + 8 = 7 and 2x – 4y = -8

x = 1 and 2(1) – 4y = -8

2 – 4y = -8

4y = 10

y = 5/2

Question 3.

(i) 2A – 3B + C (ii) A + 2C – B

Solution:

(i) 2A – 3B + C

(ii) A + 2C – B

Question 4. 

Solution:

Given,

Question 5. 

(i) find the matrix 2A + B.

(ii) find a matrix C such that:

Solution:

(i) 2A + B

(ii)

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