Question

expand (x - 3)^3
please help me​

Answer 1

Answer:

(x-3)^3

(x-3)^3 = x^3 - (3)^3 - 3 × x^2×3 + 3 × x × (3)^2.

(x-3)^3 = x^3 - (3)^3 - 3 × x^2×3 + 3 × x × (3)^2.[Using (a-b)^3 = a^3 - b^3 - 3ab(a-b) ].

(x-3)^3 = x^3 - (3)^3 - 3 × x^2×3 + 3 × x × (3)^2.[Using (a-b)^3 = a^3 - b^3 - 3ab(a-b) ].= x^3 - 27 -9x^2 + 27x.

Answer 2

Answer:

x^3 - 9x^2 + 27x - 27

Step-by-step explanation:

(a-b)^3 = a^3 - 3a^2b + 3ab^2 - b^3

(x-3)^3 = x^3 - 3x^2 *3 + 3x*3^2 - 3^3

           = x^3 - 9x^2 + 27x - 27