Question

Solve the simultaneous equations:
y - 2x = 1
y2 = 2x2 + x
помогите

Answer 1

......................

Answer 2

Y-2x=1     y=1+2x               y=1+2x                   y=1+2x
y²=2x²+x  (1+2x)²=2x²+x     1+4x+4x²=2x²+x     2x²+3x+1=0
2x²+3x+1=0
D=9-8=1 √D=1
x1=-3+1/4=-0,5
x2=-3-1/4=-1
x1=-0,5 y1=1-1=0
x2=-1    y2=1-2=-1
    Ответ:(-0,5;0) (-1;-1)