Question

11. (a+b)^3 -a-b
21. x^4+x^2+1
22. (a^2+b^2-4c^2)-4a^2 b^2



answer is. 11. (a+b)(a+b+1)(a+b-1)
answer is 21. x^4+x^2+1
answer is. 22. (a^2+b^2-4c^2)-4a^2b^2
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Answer 1

Step-by-step explanation:

11.(a+b)³ - a-b

(a+b)³ -(a+b)

(a+b) [ (a+b)² -(1)²]

(a+b) (a+b+1)(a+b-1)