c, P/t trên sẽ bằng \(\left(x+3\right)^3\), bạn cố làm theo cách của bạn nha

=  \(\left(97+3\right)^3\)

=100\(^3\)

=1000000

a, \(\dfrac{x^2}{81}-\dfrac{2}{3}x+9\)

b, \(x^2+4xy+4y^2+4x+8y+4\)

c, \(x^2-2xy+y^2+2x-2y+1\)

d, \(4x^2-\dfrac{2}{9}x+\dfrac{y^2}{81}\)

b, (x-2)(\(x^2\)+2x+4) -(\(x^3\)-8)

=(\(x^3\)-8)-(\(x^3\)-8)

=\(x^3\)-8-(\(x^3\)-8)

=\(x^3\)-8-\(x^3\)+8

=0

1.

a, (x+1)(\(x^2\)-x+1)-(\(x^3\)-8)

= ( \(x^3\)+1) - \(x^3\)+8

=\(x^3\)+1-\(x^3\)+8

=1+8

=9

1. i see a lot of people swimming and sunbathing on the beach

2. yes, I do

3. yes, it's pine forest in Hanoi