---
title: "Javascript that multiply x times x and adds y"
query: "javascript that multiply x times x and adds y"
url: "https://parka-d7b.pages.dev/pocket/javascript-multiply-x-times-x-adds-y"
providers: ["minimax"]
confidence: 100
created: "2025-12-07T05:55:48.081901+00:00"
updated: "2025-12-07T05:55:48.081901+00:00"
---

# javascript that multiply x times x and adds y

> This content was synthesized from multiple AI providers: minimax

---

## Quick solution

```js
/**
 * Returns (x * x) + y
 *
 * @param {number} x – value to be squared
 * @param {number} y – value to add after squaring
 * @returns {number}
 */
function squareAndAdd(x, y) {
    return x * x + y;   // multiplication happens before addition [1][2]
}
```

### How it works
1. `x * x` computes the square of `x` using the multiplication operator (`*`).  
2. JavaScript follows standard arithmetic precedence, so the multiplication is performed **before** the `+` addition.  
3. The result of the multiplication is then added to `y` and returned.

```js
console.log(squareAndAdd(3, 5));   // → 14  (3*3 + 5)
console.log(squareAndAdd(-2, 10)); // → 14  ((-2)*(-2) + 10)
```

## Alternative: `Math.pow`

If you prefer a method that reads like “raise to a power”, you can use `Math.pow`:

```js
function squareAndAdd(x, y) {
    return Math.pow(x, 2) + y;
}
```

Both versions produce identical results.

## Educational variant: multiplication via repeated addition

Sometimes interview or teaching scenarios ask you to build multiplication from addition only. The following demonstrates that concept:

```js
function multiplyByAddition(a, b) {
    // assumes a and b are non‑negative integers
    let result = 0;
    for (let i = 0; i < b; i++) {
        result += a;   // add a, b times [6]
    }
    return result;
}

function squareAndAdd(x, y) {
    return multiplyByAddition(x, x) + y;
}
```

This version shows how `x * x` can be expressed as `multiplyByAddition(x, x)`.

## Edge cases & tips
- **Non‑numeric inputs**: JavaScript will coerce strings that look like numbers (e.g., `"4"`), but it’s safer to enforce numeric types with `Number(x)` or type checking.  
- **Large numbers**: For very large values, consider `BigInt` (`BigInt(x) * BigInt(x) + BigInt(y)`).  
- **Negative numbers**: Squaring a negative `x` still yields a positive result because `(-x) * (-x)` is positive.

---

## About This Content

This response was synthesized by [Parka AI](https://parka-d7b.pages.dev) from multiple AI providers.
Sources include: minimax.

For the most current information, please verify from primary sources.

Canonical URL: https://parka-d7b.pages.dev/pocket/javascript-multiply-x-times-x-adds-y