Question

x²=4²+6²-2.4.2√3.√3/2

Answer 1

       x²=4²+6²-2.4.2√3.√3/2 <=>
<=> x²=16+36-16√3*√3/2 <=>
<=> x²=52-16*3/2 <=>
<=> x²=52-24 <=>
<=> x²=28 <=>
<=> x=√28 v x=-√28 <=>
<=> x=2√7 v x=-2√7

Espero ter ajudado ;)