Question

Simplify : a (b-c) -b (c- a) - c (a- b ) and evaluate its value for a= 1 ,b=2 and c=-1​

Answer 1

Answer:

a (b-c) - b (c-a) - c (a-b)

First you will simplify it like this,

watch out the sign is change so don't

miss it,

ab - ac - bc + ab - ac + bc

then ,

2ab - 2ac

now you will put the value of a,b,c

and ,

2×1×2 - 2×1×(-1)

then your answer is,

4+2=6