3x33 12xx23x1 4 gx216 x32x2xSolution3 x33 is of the form ab3

3(x-3)^3 (1+2x)(x^2-3x+1) 4 gx^2-16 x^3+2x^2+x

3). (x-3)^3 is of the form (a-b)^3 = a³ - 3a²b + 3ab² - b³

so here a =x and b =3

(x-3)^3 = x^3 -3x^2 *3 + 3x *9 - 3^3

(x-3)^3 = x^3 - 9x^2 +27x -27

4).

9x^2 -16

(3x)^2 -4^2 is of the form a^2 -b^2

but a^2 -b^2 =(a+b)(a-b)

so (3x)^2 -4^2 = (3x+4) (3x-4)