Question

найдите длины векторов

Answer 1

$|a| = sqrt{ { - 4}^{2} + { - 4}^{2} } = sqrt{16 + 16} = sqrt{32}$
$|b| = sqrt{ {6}^{2} + {0}^{2} } = sqrt{36 + 0} = sqrt{36} = 6$
$|c| = sqrt{ {7}^{2} + {6}^{2} } = sqrt{49 + 36} = sqrt{85}$