Răspuns:
a) 20√5
b) 6√60
c) 90√2
d) 6√5
e) 88
Eplacatie pas cu pas :
a) (120√150) : (30√3)= 120√(2×3×5²) : 30√3 = (120×5×√3×√2) : 30√3 = 4×5×√2 = 20√5
b) √24•√90= √(2³ × 3) × √( 2 × 3² × 5) = 2√6 × 3√10 = 6√60
c) (630√90) : (14√5) = (630√3²×2×5) : 14√5 = (630×3×√2×√5) : 14√5 = 45 × 3 ×√2 = 90√2
d) 6√12•2√15= (6√2²×3) × (2√3×5) = (6 × 2√3) × (2√3×5) = 6√5
e) 11√320:√5= (11√2⁶×5) : √5 = (11 × 8√5) : √5 = 11 × 8 = 88
#copaceibrainly
