Question

pls tell me step by step !​

Answer 1

Answer:

1. ab-bc

+bc-ca

=ab+0-ca

explanation-

we can add or subtract only if the equal variables are in line

2. 8-9xy+3x(square)-5

-7+5xy+3x(square)+0

now the number in the denominator shd be given the opposite symbol ,nd then ull get the answer

hope u find it helpful

Answer 2

$\huge⭐{\mathtt{\underline{\red{A}{\orange{N}}{\pink{S}}{\blue{W}}{\purple{E}}{\green{R\:}}}}}⭐$

ab−bc,bc−ca,ca−ab

Adding we get.

ab−bc+bc−ca+ca−ab

=0