Question

1
Simplifique as expressões.
a) (x + 2) + (x + 3) + (x + 4) + (x + 5)2
b) (2a + b)2 – (a - b)?​

Answer 1

a) x + 2 + x + 3 + x + 4 + x² + 10x + 25

x² + 13x + 34

b) 4a² + 4ab + b² - ( a² - 2ab + b²)

3a² + 6ab