Question

factorise x^3 + 27
please ​

Answer 1

Answer:

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Answer 2

Given x^3 + 27

We can write 27 as 3×3×3 = 3^3

x^3 + 3^3

(We know that a^3 + b^3 = (a+b)(a^2-ab + b^2)

so here a = x , b=3

subsitute them in the formula

(x-3)(x^2 - 3x +9) are the roots of that equation..

[ we can get one perfect root..i.e., 3 from (x-1)..but we cannot solve the other one..i.e. x^2 -3x +9..so we will stick to that]

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