Question

using appropriate property find [-3/7*5/8]+-[2/5*5/6]--[-3/7*4/5]

Answer 1

Answer:

2/5×−3/7−1/14−3/7×3/5

=2/5×−3/7−3/7×3/5−1/14

Taking common term, we get

=−3/7(2/5+3/5)−1/14

=−3/7×(2+3)/5−1/14

=−3/7−1/14

Taking L.C.M. we get,

=(−6−1)/14

=−7/14

=(−7÷7)/(14÷7)

We get,

=−1/2.