Question

me ajudem preciso desses respostas pra segunda feira.

Answer 1

a)
${x}^{2} = 49 \\ x = \sqrt{49} \\ x = 7$

b)
$5 {x}^{2} - 20 = 0 \\ 5 {x}^{2} = 20 \\ {x}^{2} = 20 \div 5 \\ x = \sqrt{4} = \: \: \: \: \: \: \: \: x = 2$


c)
$24 = 6 {x}^{2} \\ 24 \div 6 = {x}^{2} \\ x = \sqrt{4} \\ x = 2$



e)
$- 25 + 100 {x}^{2} = 0 \\ 100 {x}^{2} = 25 \\ {x}^{2} = 25 \div 100 \\ x = \sqrt{0.25} \: \: \: \: \: \: \: \: \: x = 0.5$