Question

calcule raiz 1,21+0, 7

Answer 1

$\sqrt{1,\!21}+0,\!7\\\\ =\sqrt{\dfrac{121}{100}}+0,\!7\\\\\\ =\sqrt{\dfrac{11^2}{10^2}}+0,\!7\\\\\\ =\sqrt{\left(\dfrac{11}{10}\right)^{\!2}}+0,\!7\\\\\\ =\dfrac{11}{10}+0,\!7\\\\\\ =1,\!1+0,\!7\\\\\\ =\boxed{\begin{array}{c}1,\!8 \end{array}}\quad\quad\checkmark$


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