Question

(iii) 8(x + y)^3 - 27(x - y)^3?
(iv) 8a^3 - b^3 - 4ax + 2bx
(v) a^6 + b^6
10. If a+b+c=5 and ab + bc + ca =10
a^3+ b^3+ c^3-3abc= -25.
11. Prove that
(a+b+c)^3– a^3 - b^3 -c^3 = 3(a+b)(b+c)(c+a) solve only 3 '4 and5
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Answer 1

Please send the complete questions, what has to be done is unclear