Question

7/5,-3/12,5/2 verifie a(b+c)=ab+ac
say it immediately​

Answer 1

Answer:

$\frac{7}{5} \times ( \frac{ - 3}{12} + \frac{5}{2} ) \\ lcm \: of \: 12 \: and \: 2 = 12 \\ \frac{7}{5} \times ( \frac{ - 3 + 30}{12} ) \\ \frac{7}{5 } \times \frac{27}{12} \\ \frac{189}{60} = \frac{63}{30} = \frac{21}{10} = 2 \frac{1}{10}$