diketahui matriks p=[x+2y -3 -1 2x+3y] dan matriks Q= [4 -1 -3 9] jika p=Qt tentukan nilai x dan y

jawab
P = Q^t
[x+2y...-3 ...-1...2x+3y] = [ 4...-3...-1....9]
x + 2y = 4 }kali 2
2x + 3y = 9

2x + 4y = 8
2x + 3y = 9 |(-)
y = -1

2x + 4y = 8
2x + 4(-1) = 8
2x = 12
x= 6

(x,y)= (6, -1)