Question

[(\(\dfrac{-1}{2}\))² - 1,2] -(0,8 - \(\dfrac{3}{4}\))

Answer 1

\(=\left[\dfrac{1}{4}-\dfrac{6}{5}\right]-\dfrac{4}{5}+\dfrac{3}{4}\)

\(=\dfrac{1}{4}-\dfrac{6}{5}-\dfrac{4}{5}+\dfrac{3}{4}\)

=1/4+3/4-6/5-4/5

=1-2

=-1

Answer 2

\(\left[\left(\dfrac{-1}{2}\right)^2-1,2\right]-\left(0,8-\dfrac{3}{4}\right)\)

\(=\left[\dfrac{1}{4}-\dfrac{6}{5}\right]-\left(\dfrac{4}{5}-\dfrac{3}{4}\right)\)

\(=\dfrac{1}{4}-\dfrac{6}{5}-\dfrac{4}{5}+\dfrac{3}{4}\)

\(=\left(\dfrac{1}{4}+\dfrac{3}{4}\right)-\left(\dfrac{6}{5}+\dfrac{4}{5}\right)\)

\(=1-2\)

\(=-1\)