Question

Помогите пожалуйста срочно надо (2\3)^2+13\21*(2целых 3\13-9\16)

Answer 1

$( \frac{2}{3} )^{2}+ \frac{13}{21}*(2 \frac{3}{13}- \frac{9}{16} )= \frac{4}{9} + \frac{13}{21}*( \frac{2*13+3}{13}- \frac{9}{16} )=$$\frac{4}{9} + \frac{13}{21}*( \frac{29}{13}- \frac{9}{16} )=\frac{4}{9} + \frac{13}{21}* \frac{29*16-9*13}{13*16} =\frac{4}{9} + \frac{464-117}{21*16} =$$\frac{4}{9} + \frac{347}{336} = \frac{336*4+347*9}{3024} = \frac{4467}{3024} =1 \frac{1443}{3024}$