Ex 3.2

Chapter 3 Class 12 Matrices
Serial order wise

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### Transcript

Ex 3.2,9 Find x and y, if 2[■8(1&[email protected]&𝑥)] + [■8(𝑦&[email protected]&2)] = [■8(5&[email protected]&8)] Given that 2[■8(1&[email protected]&𝑥)] + [■8(𝑦&[email protected]&2)] = [■8(5&[email protected]&8)] [■8(1×2&3×[email protected]×2&𝑥×2)] + [■8(𝑦&[email protected]&2)] = [■8(5&[email protected]&8)] [■8(𝟐&𝟔@𝟎&𝟐𝒙)] + [■8(𝒚&𝟎@𝟏&𝟐)] = [■8(𝟓&𝟔@𝟏&𝟖)] [■8(2+𝑦&[email protected]+1&2𝑥+2)] = [■8(5&[email protected]&8)] [■8(𝟐+𝒚&𝟔@𝟏&𝟐𝒙+𝟐)] = [■8(𝟓&𝟔@𝟏&𝟖)] Since matrices are equal. Corresponding elements are equal Therefore, 2 + y = 5 2x + 2 = 8 Solving (1) 2 + y = 5 y = 5 – 2 y = 3 Solving (2) 2x + 2 = 8 2x = 8 – 2 2x = 6 x = 𝟔/𝟐 = 3 Hence, x = 3 & y = 3

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#### Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.