Question

\(\left(1+\frac{2}{3}-\frac{1}{4}\right)\left(0,8-\frac{3}{4}\right)^2\)

Giải giúp mình nhé, thank!

Answer 1

\(\left(1+\frac{2}{3}-\frac{1}{4}\right)\left(0.8-\frac{3}{4}\right)^2\)

= \(\left(\frac{12+8-3}{12}\right)\left(\frac{3,2-3}{4}\right)^2\)

= \(\frac{17}{12}.\left(\frac{0,2}{4}\right)^2\)

\(\frac{17}{12}.\frac{1}{400}\)

=\(\frac{17}{4800}\)

Answer 2

\(\left(1+\frac{2}{3}-\frac{1}{4}\right)\left(0,8-\frac{3}{4}\right)^2\)

\(=\left(\frac{12}{12}+\frac{8}{12}-\frac{3}{12}\right)\left(\frac{4}{5}-\frac{3}{4}\right)^2\)

\(=\frac{17}{12}\cdot\left(\frac{16}{20}-\frac{15}{20}\right)^2\)

\(=\frac{17}{12}\cdot\left(\frac{1}{20}\right)^2\)

\(=\frac{17}{12}\cdot\frac{1}{400}\)

\(=\frac{17}{4800}\)