Question

me ajudem com a "D" e a "E" por favor!​

Answer 1

Resposta:

Explicação passo-a-passo:

$D:\\\\4(x^{2} -5)=16\\\\4x^{2} -20=16\\\\4x^{2} =16+20\\\\4x^{2} =36\\\\x^{2} =\frac{36}{4}\\ \\x^{2} =9\\\\x=\sqrt{9}\\ \\x=3\\\\E:\\\\\frac{x^{2} }{2}=5\\ \\x^{2} =2.5\\\\x^{2} =10\\\\x=\sqrt{10}$