Question

Tolong yaa nomer satu, besok dikumpulin

Answer 1

X-y = 0 => 0x²+x-y = 0
x²+5x-y = 2 => x²+5x-y = 2 (dikurang)
Hasilnya : -x²-4x = -2
x²+4x = 2
x(x+4) = 2
x=0 x=-4

subtitusikan x=-4 ke persamaan :
x²+5x-y = 2
(-4)²+5(-4)-y = 2
16-20-y = 2
-4-y = 2
-y = 2+4
-y = 6
y = -6

jadi x+y = -4+(-6) = -10
maaf klo salah