Matriksbantu jawab dgn benar!jgn ngasal​

Penjelasan dengan langkah-langkah:

soalno2.

determinan = ad-bc =

2x ×3 -(-5×4) =

6x +20

determinan = 2

6x + 20 =2

6x = -18

x = –3

soalno3

|P| = -3×5 – (-10×1)= -15+10 = -5

|Q| = 2×5-6×1 = 10-6=4

|P|.|Q| -4 |Q| =

-5×4 -4×4 =

-20-16 =

–36

soal no4.

|A| = x(2x+1)-3×1=2x²+x-3

|B| = 8x(-2) -2×19= -16x-38

|A| = |B|

2x²+x-3 = -16x-38

2x²+17x+35=0

(2x +7)(x+5)=0

x = -7/2 atau x = -5

soalno5.

|P| = 3.2.4+ -1.5.1+2.2.3 -2.2.1-

3.5.3-(-1).2.4 =

24-5+12-4-45+8 =

–10

|Q| = -2×4 -3×(-5) =

-8 +15 =

7

|P|×|Q| =

-10 × 7 =

–70