Question

1)Expresse cada numero como raiz quadrada EX: 5 =√25
A)10 D)2,6
B)0 E)0,2
C)13 F)3/7
2) calcule mentalmente
A)√1
B)√121
C)√1,25
D)√0,49
E)√0,09
F)√4/25

Answer 1

1.

$a)\\10=\sqrt{10^2}~=~\boxed{\sqrt{100}}\\\\\\b)\\0=\sqrt{0^2}=\boxed{\sqrt{0}}\\\\\\c)\\13=\sqrt{13^2}=\boxed{\sqrt{169}}\\\\\\d)\\2,6=\frac{26}{10}=\sqrt{\frac{26^2}{10^2}}=\sqrt{\frac{676}{100}}=\boxed{\sqrt{6,76}}\\\\\\e)\\0,2=\frac{2}{10}=\sqrt{\frac{2^2}{10^2}}=\sqrt{\frac{4}{100}}=\boxed{\sqrt{0,04}}\\\\\\f)\\\frac{3}{7}=\sqrt{\frac{3^2}{7^2}}=\boxed{\sqrt{\frac{9}{49}}}$

2)

$a)\\\sqrt{1}=1\\\\b)\\\sqrt{121}=11\\\\c)\\\sqrt{1,25}=\sqrt{\frac{125}{100}}=\frac{5\sqrt{5}}{10}=\frac{\sqrt{5}}{2}\\\\d)\\\sqrt{0,49}=\sqrt{\frac{49}{100}}=\frac{7}{10}=0,7\\\\e)\\\sqrt{0,09}=\sqrt{\frac{9}{100}}=\frac{3}{10}=0,3\\\\f)\\\sqrt{\frac{4}{25}}=\frac{2}{5}=0,4$