Question

só responda se souber eu imploro que me ajudem pfv produtos notáveis a) (3x-1).(3x+1) b) (4x² + 6).(4x² - 6) c) (3x + 1).(3x + 1) d) (x – 4).(x – 4) = e) (3x -2) . (3x + 2)=

Answer 1

Oie, Td Bom?!

a)

$= (3x - 1) \: . \: (3x + 1) \\ = (3x) {}^{2} - 1 {}^{2} \\ = 9x {}^{2} - 1$

b)

$= (4x {}^{2} + 6) \: . \: (4x {}^{2} - 6) \\ = (4x {}^{2} ) {}^{2} - 6 {}^{2} \\ = 16x {}^{4} - 36$

c)

$= (3x + 1) \: . \: (3x + 1) \\ = (3x + 1) {}^{2} \\ = (3x) {}^{2} + 2 \: . \: 3x \: . \: 1 + 1 {}^{2} \\ = 9x {}^{2} + 6x + 1$

d)

$= (x - 4) \: . \: (x - 4) \\ = (x - 4) {}^{2} \\ = x {}^{2} - 2x \: . \: 4 + 4 {}^{2} \\ = x {}^{2} - 8x + 16$

e)

$= (3x - 2) \: . \: (3x + 2) \\ = (3x) {}^{2} - 2 {}^{2} \\ = 9x {}^{2} - 4$

Att. Makaveli1996