Question

5) Efetue :
a) (5x + 2y) (5x – 2y)
b) (8 a -1)(8 a + 1)
c) ( y2 + 4 a) (y2 – 4 a)

Answer 1

Explicação passo-a-passo:

a)

(5x + 2y).(5x - 2y)

= (5x)² - (2y)²

= 25x² - 4y²

b)

(8a - 1).(8a + 1)

= (8a)² - 1²

= 64a² - 1

c)

(y² + 4a).(y² - 4a)

= (y²)² - (4a)²

= y⁴ - 16a²