e essa aqui tb por favor
(1-x)³
8a+27
3-x³
muito fácil.
8a+27 e 1-x³
(2a+3)³=
(2a)³ +3 *(2a)²*3 + 3*2a*(3)²+(3)³=
8a³ + 3*4a²*3 + 6a*9 + 27=
8a³ + 36a² +54a + 27=
(1-x)³=
(1)³ - 3 *(1)²*x + 3*1*(x)² - (x)³=
1 - 3x + 3x² - x³=
(2a+3)³
(2a+3).(4a²+6a+9)
8a³+12a²+18a+12a²+18a+27
8a³+24a²+36a+27 <--
(1-x)³
(1-x).(1-2x+x²)
1-2x+x²-x+2x²-x³
-x³+3x-3x+1 <---
Comments
8a+27
3-x³
muito fácil.
8a+27 e 1-x³
(2a+3)³=
(2a)³ +3 *(2a)²*3 + 3*2a*(3)²+(3)³=
8a³ + 3*4a²*3 + 6a*9 + 27=
8a³ + 36a² +54a + 27=
(1-x)³=
(1)³ - 3 *(1)²*x + 3*1*(x)² - (x)³=
1 - 3x + 3x² - x³=
(2a+3)³
(2a+3).(4a²+6a+9)
8a³+12a²+18a+12a²+18a+27
8a³+24a²+36a+27 <--
(1-x)³
(1-x).(1-2x+x²)
1-2x+x²-x+2x²-x³
-x³+3x-3x+1 <---