Подстановка условия
[src]
sqrt(a + 10*sqrt(a - 1*25)) при a = -3
___________________
/ ________
\/ a + 10*\/ a - 25
$$\sqrt{a + 10 \sqrt{a - 25}}$$
____________________
/ _________
\/ a + 10*\/ -25 + a
$$\sqrt{a + 10 \sqrt{a - 25}}$$
$$a = -3$$
__________________________
/ ____________
\/ (-3) + 10*\/ -25 + (-3)
$$\sqrt{(-3) + 10 \sqrt{(-3) - 25}}$$
_____________________
/ _________
\/ -3 + 10*\/ -25 - 3
$$\sqrt{-3 + 10 \sqrt{-25 - 3}}$$
_________________
/ ___
\/ -3 + 20*I*\/ 7
$$\sqrt{-3 + 20 \sqrt{7} i}$$