Question

$1.) sqrt[4]{16 a^6/c^3}*sqrt[4]{625c^1^1/a^1^8} = </var></p> <p><var> 2.) sqrt{x} - 2 sqrt[4]{x} - 15 = 0$

Answer 1

$1)2 a^{3/2}/ c^{3/4} *5 c^{11/4}/ a^{9/2} =10* c^{2} /a^{3} 2) sqrt[4]{x} =y y^{2}-2y-15=0 D=4+60=64 x_{1,2} = frac{2pm8}{2}=5; -3 -3 ne podhodit iz-za minusa sqrt[4]{x}=5 x=625$