[Guide] Basic JS: Ternary operator. Fixes and enhancements (#22633)

1. Fix code solution (it used the assignment operator to compare _a_ and _b_ instead of the comparison one; which wouldn't pass the test at the exercise page).
2. Add problem explanation, hint, code explanation, run example and resources

guide/english/certifications/javascript-algorithms-and-data-structures/basic-javascript/use-the-conditional-ternary-operator/index.md

@@ -3,15 +3,36 @@ title: Use the Conditional (Ternary) Operator
 ---
 ## Use the Conditional (Ternary) Operator
 
-### Hint 1
+### Problem explanation:
-Use ternary operator to check for equality.
+_Use the `conditional operator` in the `checkEqual` function to check if two numbers are equal or not. The function should return either true or false._
 
-### Warning Solution Ahead!!!
+#### Hint 1
+Remember that the "traditional" `if...else` syntax can be re-written using the conditional operator (`condition ? statement if true : statement if false;`)
+> _try to solve the problem now_
+> 
+
+
+## Spoiler alert!
+
+**Solution ahead!**
+
+## Code solution:
 
 ```javascript
 function checkEqual(a, b) {
-  return (a == b ? true : false );
+  return a === b ? true : false;
 }
-
-checkEqual(1, 2);
 ```
+·  Run code at [repl.it](https://repl.it/@AdrianSkar/Basic-JS-Ternary-operator).
+
+### Code explanation
+- The function checks if the `condition` before the interrogation sign (`?`) is true, and if so, executes the `true` statement. Otherwise, it returns `false`.
+
+
+### Resources
+
+- ["Conditional (ternary) operator" - *MDN JavaScript reference*](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Conditional_Operator)
+
+
+
+