X^2-4x-5x+20-2x^2+12x= -x^2+3x+20
6log(-x,1/2) - log(x^2,1/2)^2 = 2
6 log(-x,1/2) - 4log(-x,1/2)^2 = 2
t = log(-x,1/2)
2t^2 - 3t + 1 = 0
D = 9 - 8 = 1
t1 = (3+1)/4 = 1
t2 = (3-1)/4 = 1/2
log(-x,1/2) = 1 => x = -1/2
log(-x,1/2) = 1/2 => x = -корень(2)/2
Квадрат суммы:
1/9m^2+4/81m+4/9
Ответ:
(8+3) • 22 • (-1) = 11 • 22 • (-1) = 242 • (-1) = -242
-5a²-10ab-5b²=-5(a²+2ab+b²)=-5(a+b)²