Question

e) A somado quadrado dos números Peb
3) Resolva e marque X na resposta correta: (1,0) Pág 1
a) (X+Y)2
( ) x2-3xy +y?
( ) 2x2+2xy +
( )x2 +2xy + y2
b) (x+4)2
( ) x2 +8% +16 ( ) x2-3x +y2
( ) x2-3x +y ( ) x2 +2x +10​

Answer 1

Resposta:

3) a) x² + 2xy + y²

b) x² + 8x + 16

Explicação passo-a-passo:

a) (x + y). (x+y)

x . x = x²

x . y = xy

y. x = xy

y . y = y²

x² + xy + xy + y² = x² + 2xy + y²

b) (x + 4). (x + 4)

x . x = x²

x . 4 = 4x

x . 4 = 4x

4 . 4 = 16

x² + 4x + 4x + 16 = x² + 8x + 16