Question

QUADRADO DA SOMA DE DOIS TERMOS calcule: a) (3+x)² = b) (x+5)² = c) (x+y)² =

Answer 1

PERGUNTA:

1 ) Calcule o quadrado da soma de dois termos :

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+3a)²

H°(2a+x)²

Resposta:

a) (3+x)^2 = 3^2 +2.3.x +x^2 =

9 +6x +x^2

b) (x+5)^2 = x^2 +2.x.5 +5^2 =

x^2 +10x +25

c) (x+y)^2 = x^2 +2.x.y +y^2=

x^2 +2xy +y^2

d) (x+2)^2 = x^2 +2.x.2 +2^2=

x^2 +4x +4

e) (3x+2)^2 = 3x^2 +2.3x.2 +2^2=

9x^2 +12x +4

f) (2x+1)^2 = 2x^2 +2.2x.1 +1^2=

4x^2 +4x +1

g) (5+3a)^2 = 5^2 +2.5.3a +3a^2=

25 +30a +9a^2

h) (2a+x)^2 = 2a^2 +2.2a.x +x^2=

4a^2 +4ax +x^2