Question

A)3a²⁴√5+8a²⁴√5+12a²⁴√5
b)√7_25-√343

Answer 1

$3a^{24}. \sqrt{5} +8a^{24}. \sqrt{5}+12a^{24}. \sqrt{5} \\ \\ \\ 11a^{24} .\sqrt{5}.+12a^{24}. \sqrt{5} \\ \\ \\ =\ \textgreater \ 23a^{24} \sqrt{5}$


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$\dfrac{ \sqrt{7}}{25} - \sqrt{343} \\ \\ \\ \dfrac{ \sqrt{7}}{25} - \sqrt{7^3} \\ \\ \\ \\ \dfrac{ \sqrt{7} - \sqrt{7^3} }{25} \\ \\ \\ \dfrac{\sqrt{7} - 25.7\sqrt{7}}{25} \\ \\ \\ =\ \textgreater \ -\dfrac{174\sqrt{7}} {25}$