Question

se a² = 99³ e b² =99 sobre 7 então ab é igual a​

Answer 1

$a^{2} =99^{3} \\b^{2}=\frac{99}{7}  \\\sqrt{a^{2} }=\sqrt{99^{3} } \\a=99\sqrt{99}\\\sqrt{b^{2} }=\sqrt{\frac{99}{7} }  \\b=\frac{\sqrt{99} }{\sqrt{7} }\\ ab=99\sqrt{99} *\frac{\sqrt{99} }{\sqrt{7} } =\frac{99^{2} }{\sqrt{7} } =\frac{9801}{\sqrt{7} } *\frac{\sqrt{7} }{\sqrt{7} }=\frac{9801\sqrt{7} }{7}$