The problem asks to find the intersection points of the curve $y = 2x^2 + 3x - 2$ and the line $y = 2x - 1$.

AlgebraQuadratic EquationsSystem of EquationsIntersection PointsFactoring
2025/4/27

1. Problem Description

The problem asks to find the intersection points of the curve y=2x2+3x2y = 2x^2 + 3x - 2 and the line y=2x1y = 2x - 1.

2. Solution Steps

To find the intersection points, we need to solve the system of equations:
y=2x2+3x2y = 2x^2 + 3x - 2
y=2x1y = 2x - 1
We can substitute the second equation into the first equation:
2x1=2x2+3x22x - 1 = 2x^2 + 3x - 2
Now we rearrange the equation to get a quadratic equation in standard form:
0=2x2+3x22x+10 = 2x^2 + 3x - 2 - 2x + 1
0=2x2+x10 = 2x^2 + x - 1
We can solve this quadratic equation by factoring:
2x2+2xx1=02x^2 + 2x - x - 1 = 0
2x(x+1)1(x+1)=02x(x + 1) - 1(x + 1) = 0
(2x1)(x+1)=0(2x - 1)(x + 1) = 0
This gives us two possible values for xx:
2x1=02x=1x=122x - 1 = 0 \Rightarrow 2x = 1 \Rightarrow x = \frac{1}{2}
x+1=0x=1x + 1 = 0 \Rightarrow x = -1
Now we find the corresponding yy values for each xx value by substituting them into the equation y=2x1y = 2x - 1:
For x=12x = \frac{1}{2}:
y=2(12)1=11=0y = 2(\frac{1}{2}) - 1 = 1 - 1 = 0
So, one intersection point is (12,0)(\frac{1}{2}, 0).
For x=1x = -1:
y=2(1)1=21=3y = 2(-1) - 1 = -2 - 1 = -3
So, the other intersection point is (1,3)(-1, -3).

3. Final Answer

The intersection points are (12,0)(\frac{1}{2}, 0) and (1,3)(-1, -3).

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