Question

(15 pts) 7. Use Cramer's rule ONLY to solve the equation Ax = b, where [2 1 47 1 1 2. A= X= , b = (3 4 3

linear algebra question.
please help me with this and show your work.

Answer 1

given X A: UL firstly leid understand that what exactly coomer's sule Dayo! Solution that solution of system ayo km Ax=b Ax Fb It is says given that by When Dr D is the determinant of mart A is determinant of morrit obrained by replacing first Column of A with b. is determinant of notzid obtained by replacing second Columa of t win b Dag

the is replacing determinant third Columo by of of monit obkined A wim b. Now leals apply this rule o giver system, we have - л D - = 21-5) - (-3) +4 (1) = -3 ) 3 2 3 4 141 1 1 - 2 (65)-(-5)+(-5) = -25 Bu, - - DP 41 = Lotyw 21-5)-(-3)+4 (4) = | - & w w - I 3 M 8 Daz 18 ! 21 a nie = 315)--(y) +2 () = 3 4 1. - I a so we have 225, 22-122 Borg