(m^3+6n^2)^2-(6n^2m^3)^2=2m^3*12n^2=24m^3 n^2
(9z+2x^4)^2-(2x^4-9z)^2=18z*4x^4=72x^4 z
(3/7)^(1/x²)^(x²-2x)≥1 ОДЗ: x≠0
(3/7)^((x²-2x)/x²)≥1
(7/3)^((2x-x²)/x²)≥(7/3)^0 ⇒
(2x-x²)/x²≥0
x²>0 ⇒
2x-x²≤0
x*(2-x)≤0
-∞_________+________0________-_________2________+________+∞
x∈(0;2].
X - 1 = 4(2x + 5)
x - 1 = 8x + 20
8x - x = - 1 - 20
7x = - 21
x = - 3