Question

*** VALENDO 20 PONTOS *** ( PRECISO DOS CALCULOS )

A) (3+X)²

B) ( X+5)²

C) ( X+Y)²

D) ( X+2)²

E) ( 3X+2)²

F) ( 2X+1)²

G) ( 5+3X)²

H) ( 2X+Y)²

Answer 1

a) (3 + x)² = 3² + 2.3.x + x² = 9 + 6x + x² 

b) (x + 5)² = x² + 2.x.5 + 5² = x² + 10x + 25

c) (x + y)² = x² + 2.x.y + y² = x² + 2xy + y²

d) (x + 2)² = x² + 2.x.2 + 2² = x² + 4x + 4

e) (3x + 2)² = (3x)² + 2.3x.2 + 2² = 9x² + 12x + 4

f) (2x + 1)² = (2x)² + 2.2x.1 + 1² = 4x² + 4x + 1

g) (5 + 3x)² = 5² + 2.5.3x + (3x)² = 25 + 30x + 9x²

h) (2x + y)² = (2x)² + 2.2x.y + y² = 4x² + 4xy + y²

Espero ter ajudado!