Check sibling questions

Misc. 9 - Chapter 3 Class 12 Matrices (Term 1)

Last updated at Jan. 17, 2020 by

Misc 9 - Find x, if [x -5 -1] [1 0 2 0 2 1 2 0 3] - Miscellaneous

Misc. 9 - Chapter 3 Class 12 Matrices - Part 2

Transcript

Misc 9 Find x, if [x -5 -1] [■8(1&0&[email protected]&2&[email protected]&0&3)] [■8(𝑥@[email protected])] = O 〖"[x −5 −1]" 〗_(1×3) [■8(1&0&[email protected]&2&[email protected]&0&3)]_(3×3) [■8(𝑥@[email protected])]_(3×1) = O 〖"[x(1) + (−5) (0) + (–1)(2) x(0) +(– 5) (2) + (−1)0 x(2) + (– 5)(1) + (−1)(3)]" 〗_(1×3) [■8(𝑥@[email protected])] = O 〖"[x + 0 – 2 0 – 10 + 0 2x – 5 − 3]" 〗_(1×3) [■8(𝑥@[email protected])]_(3×1)= O 〖"[x – 2 – 10 2x – 8]" 〗_(1×3) [■8(𝑥@[email protected])]_(3×1) = O 〖"[(x – 2)(x) + (−10) (4) + (2x − 8) (1)]" 〗_(1×1) = O (x– 2)x – 10 (4) + 2x – 8 (1) = 0 x2 – 2x – 40 + 2x – 8 = 0 x2 + 0 – 48 = 0 x2 – 48 = 0 x2 = 48 x = ±√48 x = ±√(4 × 4 × 3) x = ± 4√3 Hence, x = ± 4√𝟑

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.