Question

Quanto é 
$8 \sqrt{x^3} + \sqrt{x^3}$

Answer 1

$8\sqrt{x^{3}}+\sqrt{x^{3}} \\\\ 8\sqrt{x^{3}}+1\sqrt{x^{3}} = 9\sqrt{x^{3}}$

$9\sqrt{x^{3}} = 9\sqrt{x^{2} \cdot x} = 9 \cdot x \sqrt{x} = \boxed{\boxed{9x\sqrt{x}}}$