×-3y+7=0 dan ײ-2×y+y²-1=0 adalah​

Jawaban:

(x²-2xy+y²) – 1 = 0

(x – y)² – 1 = 0

(x – y)² = 1

√(x-y)² = √1

x – y = 1 dan x – y = -1

pers diatas disebut pers linier dua variabel

x – 3y + 7 = 0

x – 3y = – 7

pers diatas disebut pers linier dua variabel