Question

$8 \sqrt{48} - 8 \sqrt{80} + 5 \sqrt{405} - 4 \sqrt{147}$
va rog mult ​

Answer 1

$8 \sqrt{48} - 8 \sqrt{80} + 5 \sqrt{405} - 4 \sqrt{147} = \\ \\ 8 \times 4 \sqrt{3} - 8 \times 4 \sqrt{5} + 5 \times 9 \sqrt{5} - 4 \times 7 \sqrt{3} = \\ \\ 32 \sqrt{3} - 32 \sqrt{5} + 45 \sqrt{5} - 28 \sqrt{3} = \\ \\ (32 \sqrt{3} - 28 \sqrt{3}) + ( - 32 \sqrt{5} + 45 \sqrt{5}) = \\ \\ 4 \sqrt{3} + 13 \sqrt{5}$

Answer 2

8√48-8√80+5√405-4√147=

=8×4√3-8×4√5+5×9√5-4×7√3=

=32√3-32√5+45√5-28√3=4√3+13√5