Math: Added solveQuadratic()

will be used in future for XP. This is extracted from the experience work branch.

src/pocketmine/math/Math.php

@@ -38,4 +38,30 @@ abstract class Math{
 		$i = (int) ($n + 1);
 		return $n >= $i ? $i : $i - 1;
 	}
+
+	/**
+	 * Solves a quadratic equation with the given coefficients and returns an array of up to two solutions.
+	 *
+	 * @param float $a
+	 * @param float $b
+	 * @param float $c
+	 *
+	 * @return float[]
+	 */
+	public static function solveQuadratic(float $a, float $b, float $c) : array{
+		$discriminant = $b ** 2 - 4 * $a * $c;
+		if($discriminant > 0){ //2 real roots
+			$sqrtDiscriminant = sqrt($discriminant);
+			return [
+				(-$b + $sqrtDiscriminant) / (2 * $a),
+				(-$b - $sqrtDiscriminant) / (2 * $a)
+			];
+		}elseif($discriminant == 0){ //1 real root
+			return [
+				-$b / (2 * $a)
+			];
+		}else{ //No real roots
+			return [];
+		}
+	}
 }