Jika penyelesaian sistem persamaan tersebut (a,b,c) nilai a^2 + bc adalah… Pakai cara ya…

Jawaban:

(x-y)/7 – z = -4

2x + (y+3z)/4 = 11

x – z/5 = 3

selesaiannya :

(x-y)/7 = -4 + z —-> (-4+z)7 = x – y

-28 + 7z = x – y

x – y – 7z + 28 = 0

(y+3z)/4 = 11 – 2x —> (11-2x)4 = y + 3z

44 – 8x = y + 3z

8x + y + 3z – 44 = 0

z/5 = (x – 3) —-> 5(x-3) = z

5x – 15 – z = 0