https://github.com/damianc/math-qfzeros

Returns zeros of a quadratic function.
https://github.com/damianc/math-qfzeros

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Returns zeros of a quadratic function.

• Host: GitHub
• URL: https://github.com/damianc/math-qfzeros
• Owner: damianc
• Created: 2023-09-28T09:26:51.000Z (over 1 year ago)
• Default Branch: master
• Last Pushed: 2023-10-05T17:55:19.000Z (about 1 year ago)
• Last Synced: 2023-10-05T18:43:29.740Z (about 1 year ago)
• Language: JavaScript
• Size: 1.95 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# math-qfzeros

Method returns the roots (or zeros) of the univariate quadratic function $f(x)=ax^2+bx+c$: `null`, $[x_0]$ or $[x_1,x_2]$.

  

```

Math.qfZeros(a,b,c)

```

  

We can get the intersection points of a parabola and horizontal line $y=0x+n$, what may be interpreted as if x-axis were translated by $n$ units towards the top (or towards the bottom for $-n$). To do so, pass 4th parametr:  

  

```

Math.qfZeros(a,b,c,y)

```

```

const a = -2;

const b = 3;

const c = 4;

Math.qfZeros(a,b,c)

// [-0.851, 2.351]

Math.qfZeros(a,b,c,4)

// [0, 1.5]

Math.qfZeros(a,b,c,-4)

// [-1.386, 2.886]

```