The geometric interpretation of the system means to check
if the given line and parabola are intercepting in 2 points, one point or any point at
all.
We'll solve the system putting the 1st equation equal
to the 2nd one.
x^2 - x + 1 = 3 -
2x
We'll move all terms to the
left:
x^2 - x + 1 - 3 + 2x =
0
We'll combine like
terms:
x^2 + x - 2 = 0
We'll
apply quadratic formula:
x1 = [-1+sqrt(1 +
8)]/2
x1 = (-1+3)/2
x1 =
1
x2 = -2
The y va;ues
are:
y1 = 3 - 2x
y1 = 3 -
2
y1 = 1
y2 = 3 +
4
y2 = 7
The solutions of the
system are the pairs: (1 , 1) and (-2 ,
7).
Since the system has 2 solutions, that
means that there are 2 intercepting points of the line and parabola and they are: (1 ,
1) and (-2 , 7).
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