Question

Bntu jwb pake cra

jwbn asal dihpus

Answer 1

Jawab:

Nilai x = -1 dan y = -1 (C)

Penjelasan dengan langkah-langkah:

Vektor a = [4x+2y,  -x+2y]

Vektor b = [6, 1]

a = -b

[4x+2y,  -x+2y] = [-6, -1]

4x + 2y = -6

-x + 2y = -1   _

5x = -5

x = -1

-x + 2y = -1

-(-1) + 2y = -1

1 + 2y = -1

2y = -1 - 1

2y = -2

y = -1

Nilai x = -1 dan y = -1 (C)