Check sibling questions

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

Introducing your new favourite teacher - Teachoo Black, at only β‚Ή83 per month


Transcript

Misc 9 Find x, if [x -5 -1] [β– 8(1&0&2@0&2&1@2&0&3)] [β– 8(π‘₯@4@1)] = O γ€–"[x βˆ’5 βˆ’1]" γ€—_(1Γ—3) [β– 8(1&0&2@0&2&1@2&0&3)]_(3Γ—3) [β– 8(π‘₯@4@1)]_(3Γ—1) = O γ€–"[x(1) + (βˆ’5) (0) + (–1)(2) x(0) +(– 5) (2) + (βˆ’1)0 x(2) + (– 5)(1) + (βˆ’1)(3)]" γ€—_(1Γ—3) [β– 8(π‘₯@4@1)] = O γ€–"[x + 0 – 2 0 – 10 + 0 2x – 5 βˆ’ 3]" γ€—_(1Γ—3) [β– 8(π‘₯@4@1)]_(3Γ—1)= O γ€–"[x – 2 – 10 2x – 8]" γ€—_(1Γ—3) [β– 8(π‘₯@4@1)]_(3Γ—1) = O γ€–"[(x – 2)(x) + (βˆ’10) (4) + (2x βˆ’ 8) (1)]" γ€—_(1Γ—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 Γ— 4 Γ— 3) x = Β± 4√3 Hence, x = Β± 4βˆšπŸ‘

Davneet Singh's photo - Teacher, Engineer, Marketer

Made by

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.