Question

1. Упростите выражение:
√50y - √32y + √128y=​

Answer 1

$\sqrt{50}y-\sqrt{32}y+\sqrt{128}y= \sqrt{25*2}y-\sqrt{16*2}y+\sqrt{64*2}y =\\\\=\sqrt{5^{2}*2}y-\sqrt{4^{2}*2}y+\sqrt{8^{2}*2}y=5\sqrt{2}y-4\sqrt{2}y+8\sqrt{2}y=9\sqrt{2}y$