Question

Obs: Não esquecer que se o termo estiver com potencia, tem que trabalhar a potência.

1) Calcule:
a) (x + 5)² =
b) (2x + 4)² =
c) (5x + 9)² =
d) (6x + 2/3)² =
e) (10x² + 12)²=
f) (x³ + 2x)² =
g) (13x + 20)² =

2) Calcule:
a) (x – 6)² =
b) (5x – 8)² =
c) (9x – 7)² =
d) (6x2 – 4/6)² =
e) (10x² – 12)²=
e) (x^4 – 2x²)² =
f) (11x – 6z)² =

3) Calcule:
a) (4x + 7)(4x – 7) =
b) (12x + 8)(12x – 8) =
c) (11x² – 5x)(11x² + 5x) =
d) (20b – 30)(20b + 30) =

Answer 1

Resposta:

1) Calcule:

a) (x + 5)² = x²+10x +10

b) (2x + 4)² = 4x²+16x+16

c) (5x + 9)² = 25x²+90x+81

d) (6x + 2/3)² = 36x²+8x+4/9

e) (10x² + 12)²= 100x⁴+240x²+144

f) (x³ + 2x)² = x⁶+4x⁴+4x²

g) (13x + 20)² = 169x²+520x+400

2) Calcule:

a) (x – 6)² = x²-12x+36

b) (5x – 8)² = 25x²-80x+64

c) (9x – 7)² = 81x²-126x+49

d) (6x2 – 4/6)² =36x⁴-8x²+4/9

e) (10x² – 12)²= 100x⁴-240x²+144

e) (x^4 – 2x²)² = x⁸-4x⁶+4x⁴

f) (11x – 6z)² = 121x²-132xz+36z²

3) Calcule:

a) (4x + 7)(4x – 7) = 16x²-49

b) (12x + 8)(12x – 8) = 144x²-64

c) (11x² – 5x)(11x² + 5x) = 121x⁴-25x²

d) (20b – 30)(20b + 30) = 400b²-900

Explicação passo-a-passo:

(a+b)² = a²+2ab+b²

(a-b)² = a²-2ab+b²

(a+b).(a-b) = a²-b²