Question

calcule √0,09 - √0,49 =

Answer 1

√0,09-√0,49
0,3-0,7
-0,4

Answer 2

$\sqrt{0.09} = \sqrt{ \frac{9}{100} } = \frac{ \sqrt{9} }{ \sqrt{100} } = \frac{3}{10} = 0.3 \\ \\ \sqrt{0.49} = \sqrt{ \frac{49}{100} } = \frac{ \sqrt{49} }{ \sqrt{100} } = \frac{7}{10} = 0.7 \\ \\ 0.3 - 0.7 = - 0.4$