Question

a și b de la 6 plssss dau coroana​

Answer 1

Răspuns:

5/12:(1×4/12-3×4/12)-2/3×1/5=5/12:(-8/12)-2/3×1/5= (5-8)/12-2/3×1/5=-3/12-2/15=(-3×5)/60-(2×4)/60=(-15-8)/60=-23/60.

Answer 2

Răspuns:

a.

$(\frac{5}{12} \div \frac{4 - 9}{12} ) - \frac{1 \times 3 + 2}{3} \times \frac{1 \times 5 + 1}{5} = \\ ( \frac{5}{12} \times \frac{12}{5} ) - \frac{30}{15} = \\ 1 - 2 = - 1$

b.

$\frac{15}{4} + \frac{3 \sqrt{5} }{10} \times \frac{ \sqrt{5} }{3} = \\ \frac{15}{4} + \frac{3 \times 5}{3} = \\ \frac{15}{4} + 5 = \frac{15}{4} + \frac{20}{4 } = \frac{35}{4}$