Question

3. Add the following.
(i) ab – bc, bc – ca, ca – ab
(ii) a – b + ab, b – c + bc, c – a + ac
(iii) 2p2q2 – 3pq + 4, 5 + 7pq – 3p2q2
(iv) l2 + m2, m2 + n2, n2 + l2, 2lm + 2mn + 2nl

Please tell this answers​

Answer 1

Answer:

(i) 0

(ii) ab + bc + ca

(iii) 9 + 4pq - p^2q^2

(iv) 2 [l^2 + m^2 + n^2 + lm + mn + nl]

Step-by-step explanation:

(i) ab - bc, bc - ca, ca - ab

  =ab - bc + bc - ca + ca - ab

  = 0

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

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

   = ab + bc + ca

(iii) 2p^2q^2 - 3pq + 4 + 5 + 7pq - 3p^2q^2

   = 9 + 4pq - p^2q^2

(iv) l^2 + m^2 + m^2 + n^2 + n^2 + l^2 + 2lm + 2mn + 2nl

    = 2l^2 + 2m^2+ 2n^2 + 2lm + 2mn + 2nl

     = 2 [l^2 + m^2 + n^2 + lm + mn + nl]