Put the smaller eigenvalue of A in the top left-hand corner of D1
I know how to find D2 and P2, but not D1 and P1, please help
P2=
1,1
-2,-1
D2=
-4,0
0,-8
thx
更新1:
o sorry, i forgot A is -12,-4 8,0
更新2:
hey lotus P1=[1 1//-1 -2], D1=[-8 0 //0 -4] check: P1^(-1)=[ 2 1 // -1 -1] P1^(-1)*A=[-16 -8// 4 4] P1^(-1)*A*P1=[-8 0 //0 -4] I tried P1=[1 1//-1 -2], D1=[-8 0 //0 -4] but I got P1^(-1)*A*P1= -4,0 -12,-8, this is not a diagonal matrix though :\
更新3:
Yea I got it I got it wrong because I put it in this way, thx P1*A*P1^(-1)