Question

c si g va rog
........​

Answer 1

c) $(2+x)^{3}$=

$8+12x+6x^{2} +x^{3}$

și rearanjat vine $x^{3} +6x^{2}+12x+8$

g)$(5x+a)^{3}$=

$(5x)^{3} +3*(5x)^{2} *a+3*5xa^{2} +a^{3}$=

$125x^{3} +75ax^{2} +15a^{2} x+a^{3}$