Question

2. Calculați, folosind formulele de calcul prescurtat:
a) ) (2√3+3)(2√3 −3)−(√2 − 1)(√2+1);
b) (3-√6)(3+√6)+(√3-1)(√3+1)-(3-√5)(3+√5);
c) (4-2√5)(4+2√5)+(3√2-5) (3√2+5)-(√6 +√√2)(√6-√2):

Answer 1

Răspuns:

a)12-6√3+6√3-9-2+2-√2-1

2

b)9-6+3-1-(9-5)=1

c)16-4x5+9x2-25-(6-2)=16-20+18-25-4=-15

Explicație pas cu pas:

pwp