Question

$4\sqrt{x} 80 : 4\sqrt{x} 5$

Answer 1

$4 \sqrt{x80} \div 4 \sqrt{x5 } =$

$1 \sqrt{x \times 80} \sqrt{x \times 5} =$

$\sqrt{x \times 80x \times 5} =$

$\sqrt{400x2} =$

$20x$