refactor: avoid unnecessary computation

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---

Author: kgryte

lib/node_modules/@stdlib/stats/base/dists/triangular/quantile/lib/factory.js

@@ -59,7 +59,7 @@ function factory( a, b, c ) {
 	}
 
 	pInflection = ( c - a ) / ( b - a );
-	fact1 = ( b - a ) * ( c - a);
+	fact1 = ( b - a ) * ( c - a );
 	fact2 = ( b - a ) * ( b - c );
 	return quantile;
 

lib/node_modules/@stdlib/stats/base/dists/triangular/quantile/lib/main.js

@@ -81,9 +81,6 @@ var sqrt = require( '@stdlib/math/base/special/sqrt' );
 */
 function quantile( p, a, b, c ) {
 	var pInflection;
-	var fact1;
-	var fact2;
-
 	if (
 		isnan( p ) ||
 		isnan( a ) ||
@@ -97,13 +94,11 @@ function quantile( p, a, b, c ) {
 		return NaN;
 	}
 	pInflection = ( c - a ) / ( b - a );
-	fact1 = ( b - a ) * ( c - a);
-	fact2 = ( b - a ) * ( b - c );
 	if ( p < pInflection ) {
-		return a + sqrt( fact1 * p );
+		return a + sqrt( ( b - a ) * ( c - a ) * p );
 	}
 	if ( p > pInflection ) {
-		return b - sqrt( fact2 * ( 1.0 - p ) );
+		return b - sqrt( ( b - a ) * ( b - c ) * ( 1.0 - p ) );
 	}
 	// Case: p = pInflection
 	return c;