Question

(1-2 supra 5)^2 x 3/2

Answer 1

$(1-\frac{2}{5})^2* \frac{3}{2}$
$=(1-\frac{2}{5})(1-\frac{2}{5})* \frac{3}{2}$
$=1-\frac{2}{5}-\frac{2}{5}+(\frac{2}{5})^2* \frac{3}{2}$
$=1-\frac{2}{5}-\frac{2}{5}+\frac{4}{25}* \frac{3}{2}$
$=1-\frac{2}{5}-\frac{2}{5}+\frac{12}{50}$
$=\frac{50}{50}-\frac{20}{50}-\frac{20}{50}+\frac{12}{50}|*50$
$=50-40+12$
$=10+12$
$=22$