Question

operaciones con radicales
$9. \sqrt{21} -3( \sqrt{21} +8 \sqrt{21} -(3 \sqrt{2} + \sqrt{21} )$

Answer 1

Resolver.

9√21 - 3(√21 + 8√21) - (3√2 + √21) =
9√21 - 3 √21 - 24√21 - 3√2 - √21 =
(9√21 - 3√21 - 24√21 - √21) - 3√2 =
√21(9 - 3 - 24 - 1) - 3√2
√21(-28 + 9) - 3√2 =
√21(- 19) - 3√2


Respuesta

- 19√21 - 3√2