Question

h) (3x-1 y )²
6

i) (2x²+3xy)²


j) (1 x²y+1).(1x²y-1)
4 4 auguem me ajuda ​

Answer 1

Oie, Td Bom?!

h)

$= (3x - 1y) {}^{2}$

$= (3x - y) {}^{2}$

$= (3x) {}^{2} - 2 \: . \: 3xy + y {}^{2}$

$= 9x {}^{2} - 6xy + y {}^{2}$

i)

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

$= (2x {}^{2} ) {}^{2} + 2 \: . \: 2x {}^{2} \: . \: 3xy + (3xy) {}^{2}$

$= 4x {}^{4} + 12x {}^{3} y + 9x {}^{2} y {}^{2}$

j)

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

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

$= (x {}^{2} y) {}^{2} - 1 {}^{2}$

$= x {}^{4} y {}^{2} - 1$

Att. Makaveli1996