Question

X^2+2y^2=12
2x-y=2

Mohon bantuanya

Answer 1

Y=2x-2
x^2+2y^2=12
x^2+2(2x-2)^2=12
x^2+2(4x^2-8x+4)=12
x^2+8x^2-16x+8-12=0
9x^2-16x-4=0
(9x+2)(x-2)=0
x1=-2/9 ; x2=2
y=2x-2
jika x1=-2/9 maka
y1=(2×-2/9)-2
y1= -4/9-2
y1= -2 4/9
jika x2=2 maka
y2=2×2-2
y2=4-2
y2=2
ok