Question

Add: bc - ca, ca - ab and ab - bc + abc.​

Answer 1

Answer:

abc

Step-by-step explanation:

refer to the attachment

hope it is helpful

Answer 2

Answer:

i) (ab - bc) + (bc - ca) + (ca-ab)

= ab - bc + bc - ca +ca -ab

= ab -ab -bc+bc-ca+ca

= 0

ii) (a - b + ab) + (b - c + bc) + (c - a + ac)

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

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

= ab + bc + ca

iii) 2p²q²– 3pq + 4, 5 + 7pq – 3p²q²

= (2p²q²- 3pq + 4) + (5 + 7pq - 3p²q²)

= 2p²q² - 3p²q² - 3pq + 7pq + 4 + 5

= - p²q² + 4pq + 9

iv) (l² + m²) + (m² + n²) + (n² + l²) + (2lm + 2mn + 2nl)

= l² + l² + m² + m² + n² + n² + 2lm + 2mn + 2nl

= 2l² + 2m² + 2n² + 2lm + 2mn + 2nl

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Hope this will help you..