How to Call Shortcode in PHP echo

I’m trying to do this..

echo '<h2>Featured Products</h2>[featured_products per_page="3" columns="3"]';

but all i get is Featured Products [featured_products per_page=”3″ columns=”3″] on the page.

How do you call this in php.

https://ww.wp.xz.cn/plugins/woocommerce/