Question

Решите уравнения: $7 sqrt{y}=0$
$sqrt{x} =25$
$11 sqrt{x} =10$

Answer 1

$7sqrt{y} = 0\ sqrt{y} = 0\ y = 0\\ sqrt{x} = 25\ x = 25^2 = 625\\ 11sqrt{x} = 10\ sqrt{x} = frac{10}{11}\\ x = (frac{10}{11})^2 = frac{100}{121}$