function fcn2( x, y ) {
		if ( typeof x === T ) {
			x = new ctor( x, 0.0 );
		}
		if ( typeof y === T ) {
			y = new ctor( y, 0.0 );
		}
		return fcn( x, y );
	}
Invokes a binary function accepting complex numbers.

@private
@param {(number|Complex)} x - input value
@param {(number|Complex)} y - input value
@returns {*} result