Question

Restrângeți:
a) 2√3 x 3√2
b) 7√5 x (-2√3)
c) 17√5 x (-2√3)
d) (-6√3) x (-2√3)

Answer 1

Răspuns

Explicație pas cu pas:

a) 2√3 x 3√2 =6√6

b) 7√5 x (-2√3) =-14√15

c) 17√5 x (-2√3) =-34√15

d) (-6√3) x (-2√3)=12×3=36

Answer 2

$a) \\ \\ 2 \sqrt{3} \times 3 \sqrt{2} = 2 \times 3 \sqrt{3 \times 2} = 2 \times 3 \sqrt{6} = 6 \sqrt{6}$

$b) \\ \\ 7 \sqrt{5} \times ( - 2 \sqrt{3}) = - 7 \times 2 \sqrt{5} \sqrt{3} = - 7 \times 2 \sqrt{5 \times 3} = - 7 \times 2 \sqrt{15} = - (7 \times 2) \sqrt{15} = - 14 \sqrt{15}$

$c) \\ \\ 17 \sqrt{5} \times ( - 2 \sqrt{3}) = - 17 \times 2 \sqrt{5} \sqrt{3} = - 17 \times 2 \sqrt{5 \times 3} = - 17 \times 2 \sqrt{15} = - (17 \times 2) \sqrt{15} = - 34 \sqrt{15}$

$d) \\ \\ ( - 6 \sqrt{3}) \times ( - 2 \sqrt{3}) = - 6 \sqrt{3} \times - 2 \sqrt{3} = - ( - 6 \times 2 \sqrt{3 \times 3}) = - ( - 6 \times 2 \sqrt{9}) = - ( - 6 \times 2 \times 3) = ( - 36) = 36$