Question

.)3
(10) x3 + 27y3 + 9x²y + 27xy2 = (
A. 3x + y
B. x + 3y
C. 3x - y
D. x - 3y
1​

Answer 1

Step-by-step explanation:

(i) x3+9x2+ 27x + 27

= (x)3+ 3(x)2(3)+3(x)(3)2 + (3)3

= (2x + 3)3

(ii) x3–9x2y + 27xy2 – 27y3

= x3–3(x)2(3y)+3(x)(3y)2 – (3y)3

= (x – 3y)3

Answer 2

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