![Ex 3.2, 11 - If x [2 3] + y [-1 1] = [10 5], find x and y](https://d1avenlh0i1xmr.cloudfront.net/3a2abc7c-edf1-4f8f-a552-046843d96f0d/slide37.jpg)
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Ex 3.2, 11 - Chapter 3 Class 12 Matrices (Term 1)
Last updated at Jan. 17, 2020 by Teachoo
Ex 3.2
Ex 3.2, 1
Ex 3.2, 2 (i)
Ex 3.2, 2 (ii) Important
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Ex 3.2, 2 (iv)
Ex 3.2, 3 (i)
Ex 3.2, 3 (ii) Important
Ex 3.2, 3 (iii)
Ex 3.2, 3 (iv) Important
Ex 3.2, 3 (v)
Ex 3.2, 3 (vi) Important
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Ex 3.2, 7 (i)
Ex 3.2, 7 (ii) Important
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Ex 3.2, 11 You are here
Ex 3.2, 12 Important
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Ex 3.2, 16 Important
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Ex 3.2, 20 Important
Ex 3.2, 21 (MCQ) Important
Ex 3.2, 22 (MCQ) Important
Chapter 3 Class 12 Matrices
Serial order wise
Transcript
Ex 3.2, 11 If x [■8(2@3)] + y [■8(−1@1)] = [■8(10@5)] , find values of x and y. x [■8(2@3)] + y [■8(−1@1)] = [■8(10@5)] [■8(2𝑥@3𝑥)] + [■8(−𝑦@𝑦)] = [■8(10@5)] [■8(2𝑥−𝑦@3𝑥+𝑦)] = [■8(10@5)] Since the matrices are equal. corresponding elements are equal 2x − y = 10 3x + y = 5 …(1) Solving equations Adding (1) & (2) (2x – y) + (3x + y) = 10 + 5 2x – y + 3x + y = 15 2x + 3x – y + y = 15 5x + 0 = 15 x = 15/5 x = 3 Putting value of x in (1) 2x – y = 10 2(3) – y = 10 6 – y = 10 –y = 10 – 6 –y = 4 y = –4 Hence, x = 3 & y = –4
