Question

efectuati 0,2(5)X(3/2)^2-1,8x[2,13+(-2)^3+0,87]

Answer 1

$0.2(5) \times ( \frac{3}{2} ) {}^{2} - 1.8(2.13 - 2 {}^{3} + 0.87) = \\ \\ = \frac{25 - 2}{90} \times \frac{9}{4} - \frac{18}{10} \times ( \frac{213}{100} - 8 + \frac{87}{100} ) = \\ \\ = \frac{23}{90} \times \frac{9}{4} - \frac{18}{10} \times ( \frac{213 - 800 + 87}{100} ) = \\ \\ = \frac{23}{40} - \frac{18}{10} \times ( \frac{ - 500}{100} ) = \\ \\ = \frac{23}{40} - \frac{18}{10} \times ( - 5) = \\ \\ = \frac{23}{40} + \frac{18}{10} \times 5 = \\ \\ = \frac{23}{40} + \frac{18}{2} = \\ \\ = \frac{23}{40} + 9 = \\ \\ = \frac{23 + 360}{40} = \\ \\ = \frac{383}{40}$