Errore Di Scrittura Php

[crica]

Parse error: syntax error, unexpected T_ENCAPSED_AND_WHITESPACE, expecting T_STRING or T_VARIABLE or T_NUM_STRING in C:\Program Files\EasyPHP 2.0b1\www\VET\vet2.php on line 179

echo "<tr><td>$nome</td>
<td><img src=\"image_files/ $_REQUEST['show_image']\"; size=\"20\"></td>
<td>$prezzo</td></tr>";

Mi dà l'errore sopra riportato. Cosa sto sbagliando?
Grazie.

[crica]

sapete qualcosa?

[king size slim]

echo "<tr><td>$nome</td>
<td><img src=\"image_files/". $_REQUEST['show_image'] . "\" size=\"20\"></td>
<td>$prezzo</td></tr>"; 

[elpepe]

prova così:

echo "<tr><td>".$nome."</td>
<td><img src=\"image_files/". $_REQUEST['show_image'] . "\" size=\"20\"></td>
<td>".$prezzo."</td></tr>";