Question

a-b+ab,b-c+bc,c-a+ac​

Answer 1

Answer:

a-b+ab,b-c+bc,c-a+ac

=a-b+b-c+c-a+ab+bc+ca

=+a-a+c-c+b-b+ab+bc+ca

=+a-a+b-b-c+c cancel

= ab+bc+ca

or

= take +ca on right side

so,ab+bc=-ca

or

= take+bc on right side

ab+ca=-bc

or

= take+ab on right side

bc+ca=-ac

Hence proved

thank you