Question

I ) ( 3 x - y ) ( 3 x + y ) =
m) (2 a²- b²) ( 2 a²+ b²) =
n) ( 4m + 4n ) ( 4m - 4n )=
o) (abc + ab ) ( abc - ab ) =
p ) ( 3a + 3b ) ( 3a - 3b ) =

bom dia , me ajudem por favor

Answer 1

I ) ( 3 x - y ) ( 3 x + y )=

( 3 x )^2 - y^2=

9 x^2 - y^2

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

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

4a^4 - ( b^2 )^2=

4a^4 - b^4

n) ( 4m + 4n ) ( 4m - 4n )=

( 4m )^2 - ( 4n )^2=

16m^2 - ( 4n )^2=

16m^2 - 16n^2

o) ( abc + ab ) ( abc - ab )=

( abc )^2 - ( ab )^2=

a^2b^2c^2 - ( ab )^2=

a^2b^2c^2 - a^2b^2

p) ( 3a + 3b ) ( 3a - 3b )=

( 3a )^2 - ( 3b )^2=

9a^2 - ( 3b )^2=

9a^2 - 9b^2

bom dia :)