Question

poooor favooor me ajuda!!!desenvolva algebricamente: a) (x+2)² b) (2x+10)² c)(x-3)²

d) (2x-1)² e) (x+y) (x-y)

f) (3x+y) (3x-y)

Answer 1

a) = (x+2)²
= x^2 + 2.2x + 2^2
= x^2 + 4x + 4

b)
= (2x+10)²
= (2x)^2 + 2.10.2x + 10^2
= 4x^2 + 40x + 100

c)
= (x-3)²
= x^2 - 2.3x + 9
= x^2 - 6x + 9

d)
= (2x-1)²
= (2x)^2 - 2.1.2x + 1^2
= 4x^2 - 4x + 1

e)
= (x+y).(x-y)
= x^2 - xy + xy - y^2
= x^2 - y^2

f)
= (3x + y).(3x - y)
= (3x)^2 - y^2
= 9x^2 - y^2