ada yang bisa bantu....?

Dik : A= [ˣ₅ ¹₋₂ₓ]  B= [ˣ₈ ˣₓ]     |A| = |B|
Jwb :
[ˣ₅ ¹₋₂ₓ]  =  [ˣ₈ ˣₓ]
-2x.x - 1.5 = x.x - 8.x
-2x²-5  = x²-8x
-3x² + 8x - 5 = 0
3x² -8x + 5 = 0
( x-1 ) ( 3x-5 ) = 0

>> x-1 =0
x=1

>> 3x-5 = 0
3x = 5
x = 5/3




Semoga membantu :)