Question

Add the following
1. ab-bc,bc-ca,ca-ab
2. l^2+m^2,m^2+n^2,n^2+l^2,2lm+2mn+2nl
3. 6x^2-3x+4,8x-9,15x^2-11x+10
(Please solve this question I have tried alout but answer not came)
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Answer 1

Answer:

1. 0

2. ( l + m + n)²

3. 21x² - 6x + 5

hope it helps u

Step-by-step explanation:

Answer 2

Answer:

1)0

2) 2l²+2m²+2n²+2lm+2mn+2nl

3) 21x²-6x+5

Step-by-step explanation:

1) ab-bc+bc-ca+ca-ab

(everything will be canceled and remains 0)

2) l²+m²+m²+n²+n²+l²+2lm+2mn+2nl

(on adding) we get:-

2l²+2m²+2n²+2mn+2nl+2lm

3) 6x²-3x+4+8x-9+15x²-11x+10

(on solving) we get=

21x²-6x+5