Question

Bunaa,ma puteți ajuta,va rog?
Si calculele,nu doar răspunsurile...
Mulțumesc,dau corana♡♡​

Answer 1

Răspuns:

a) 876

b) -204

c) -3360

d) -120

Explicație pas cu pas:

a) 7√20(√1125-√2205)+6√192(√1083-√300)=

=7√20(15√5-21√5)+6×8√3(19√3-10√3)

=7√20×(-6√5)+6×8√3×9√3

=-7×2√5×6√5+6×8×3×9

=-7×2×5×6+1296

=-420+1296

=876

b) 4√12(√2028-√2700)-3√8(√968-√338)=

=4√12(26√3-30√3)-3*2√2(22√2-13√2)

=4√12×(-4√3)-3×2√2×9√2

=-4×2√3×4√3-3×2×2×9

=-4×2×3×4-108

=-96-108

=-204

c) 4√12(3√75-7√27+2√507-8√1200)=

=4√12(15√3-21√3+26√3-160√3)

=4√12×(-140√3)

=-4×2√3×140√3

=-4×2×3×140

=-3360

d) √320(√980-√720+√80-√405)+√294(√150-√486+√384-√96)=

=√320(14√5-12√5+4√5-9√5)+√294(5√6-9√6+8√6-4√6)

=√320×(-3√5)+√294×0

=-8√5×3√5+0

=-8×5×3

=-120