Question

4. Calcule. a) (3 − 1 2 )(3 + 1 2 ) b) ( 1 3 + 1)( 1 3 − 1)

Answer 1

Resposta:

a)

(3 – 12)(3 + 12)

– 9 × 15

– 135

b)

(13 + 1)(13 – 1)

14 × 12

168