Question

if a=-2/5,b=-2/-3&c=-1/7 then find a(a+b)=ab+bc​

Answer 1

Answer:

$\frac{ - 2}{5} ( \frac{ - 2}{5 } + \frac{ - 2}{ - 3} ) = \frac{ -2 }{5} \times \frac{ - 2}{ - 3} + \frac{ - 2}{ - 3} \times \frac{ - 1}{7} \\ \\ \frac{ - 2}{5} ( \frac{ - 6 + 10}{15} ) = \frac{4}{15} + \frac{ - 2}{21} \\ \\ \frac{ - 2}{5} \times \frac{4}{15 } = \frac{28 - 10}{105} \\ \\ \frac{ - 4}{75} = \frac{18}{105}$

hope it help you.