Question

найдите длины векторов

Answer 1

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