The parabola intersects with the x-axis at points (- 2,0), (1,0), and has the same shape as the parabola y = 2x & # 178; + 3 The parabola intersects with the x-axis at points (- 2,0), (1,0), and has the same shape as the parabola y = 2x & # 178; + 3

The same shape means the same a
Two points are substituted into the parabolic basic equation
2b+c=8
b+c=2
The simultaneous equations are solved as follows
b=6 c=-4
Therefore, the analytical formula of parabola is as follows:
y＝2x²+6x-4

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