Question

Tolong bantu nomor 15

Answer 1

Maaf, matrik B nya harusnya 2 dan -5 salah tulis, jadi x = 2 y= 1
jadi, -2/4+5/2 -2/12+-5+6
= -1/2+5/2 -1/6+-5/6
= -1+5 / 2. -1+-5 / 6
= 4/2 -6/6 = (2 -1)
x = 2 y= -1

x2 + 2xy + y2
= 2.2 + 2.2.-1 + -1.-1
= 4 + -4 + 1
= 1
jawabannya A. 1