Matemática, perguntado por luanfofano, 11 meses atrás

Resolva:
A) √17+3√17-15√17=
B)√27+√52-√48+√117=
C)3√1080-3√40-3√5-3√1715=
D)3√2+3√2-3√2

Soluções para a tarefa

Respondido por ShinyComet
1

A)   \sqrt{17}+3\sqrt{17}-15\sqrt{17}=

  =4\sqrt{17}-15\sqrt{17}=

  =-11\sqrt{17}

B)   \sqrt{27}+\sqrt{52}-\sqrt{48}+\sqrt{117}=

  =\sqrt{3^{3}}+\sqrt{2^{2}\times 13}-\sqrt{2^{4}\times 3}+\sqrt{3^{2}\times 13}=

  =\sqrt{3^{2}\times 3}+\sqrt{2^{2}\times 13}-\sqrt{(2^{2})^{2}\times 3}+\sqrt{3^{2}\times 13}=

  =3\sqrt{3}+2\sqrt{13}-2^{2}\sqrt{3}+3\sqrt{13}=

  =3\sqrt{3}+2\sqrt{13}-4\sqrt{3}+3\sqrt{13}=

  =3\sqrt{3}-4\sqrt{3}+2\sqrt{13}+3\sqrt{13}=

  =-\sqrt{3}+5\sqrt{13}

C)   3\sqrt{1080}-3\sqrt{40}-3\sqrt{5}-3\sqrt{1715}=

  =3\sqrt{2^{3}\times 3^{3}\times 5}-3\sqrt{2^{3}\times 5}-3\sqrt{5}-3\sqrt{5\times 7^{3}}=

  =3\sqrt{2^{2}\times 2\times 3^{2}\times 3\times 5}-3\sqrt{2^{2}\times 2\times 5}-3\sqrt{5}-3\sqrt{5\times 7^{2}\times 7}=

  =3\times 2\times 3\sqrt{2\times 3\times 5}-3\times 2\sqrt{2\times 5}-3\sqrt{5}-3\times 7\sqrt{5\times 7}=

  =18\sqrt{30}-6\sqrt{10}-3\sqrt{5}-21\sqrt{35}

D)   3\sqrt{2}+3\sqrt{2}-3\sqrt{2}=

  =6\sqrt{2}-3\sqrt{2}=

  =3\sqrt{2}

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