Question

#BabMatriks Yg bisa MTK bantuin jawab please "-" #PakaiCara

Answer 1

(2x-1)(x+2) - (2)(x+2)
2x^2 + 3x - 2 - 2x - 4
2x^2 + x - 6
(2x - 3)(x+2)
x = 3/2 x = -2

Jumlah akar2nya = 3/2 + (-2)
= -1/2

Answer 2

Asumsikan matriks tersebut singular dimana determinannya bernilai 0,maka:
(2x - 1)(x + 2) - 2(x + 2) = 0
2x² + 3x - 2 - 2x - 4 = 0
2x² + x - 6 = 0

Misalkan akar2nya x1 dan x2,maka:
x1 + x2 = -1/2