Question

√18 − 6√7 − √50 + √28 me ajudem

Answer 1

Resposta: $-2\sqrt{2}-4\sqrt{7}=-13,41$

Explicação passo-a-passo:

$\sqrt{18}-6\sqrt{7}-\sqrt{50}+\sqrt{28}=\\\\=\sqrt{9\cdot2}-6\sqrt{7}-\sqrt{25\cdot2}+\sqrt{4\cdot7}=\\\\=3\sqrt{2}-6\sqrt{7}-5\sqrt{2}+2\sqrt{7}=\\\\=(3-5)\cdot\sqrt{2}+(2-6)\cdot\sqrt{7}=\\\\=-2\sqrt{2}-4\sqrt{7}=\\\\=-13,41$