diketahui sistem persamaan linear berikut. 2x-5y-9=0 dan 4x-3y+3=0. tentukan nilai x^2-2xy+y^2!

Matematika

2x - 5y = 9 ---- (×2)
4x - 3y = -3 --- (×1)

4x - 10y = 18
4x - 3y = -3
__________-
-7y = 21
y = -3

4x - 3y = -3
4x - 3(-3) = -3
4x = -3 - 9
4x = -12
x = -3

x² - 2xy + y² = (x - y)²
..................... = (-3 - (-3))²
..................... = 0²
..................... = 0