Question |
Your answer |
Correct answer |
Your award |
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4 |
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3 |
Fatal error: Uncaught TypeError: Unsupported operand types: string - string in /homepages/14/d292286011/htdocs/SUB_HocToan/Parallelogram.php:253
Stack trace:
#0 /homepages/14/d292286011/htdocs/SUB_HocToan/Parallelogram.php(472): writeToHtm(Array, 'Store/323650252...')
#1 {main}
thrown in /homepages/14/d292286011/htdocs/SUB_HocToan/Parallelogram.php on line 253