---
id: 5900f4d01000cf542c50ffe3
challengeType: 5
title: 'Problem 356: Largest roots of cubic polynomials'
videoUrl: ''
localeTitle: 问题356：三次多项式的最大根
---

## Description
<section id="description">设a是多项式的最大实根g（x）= x3  -  2n·x2 + n。例如，a2 = 3.86619826 ...... <p>找到最后八位数字。 </p><p>注意：代表楼层功能。 </p></section>

## Instructions
<section id="instructions">
</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: <code>euler356()</code>应该返回28010159。
    testString: 'assert.strictEqual(euler356(), 28010159, "<code>euler356()</code> should return 28010159.");'

```

</section>

## Challenge Seed
<section id='challengeSeed'>

<div id='js-seed'>

```js
function euler356() {
  // Good luck!
  return true;
}

euler356();

```

</div>



</section>

## Solution
<section id='solution'>

```js
// solution required
```
</section>
