Y = 3x^2 + 5x - 7
y(-2) = 3*(-2)^2 - 5*2 - 7 = 12 - 12 = 0
y = -x^2 -5x + 4 = -2
x^2 + 5x - 6 = 0
x1 + x2 = -5
x1*x2 = -6
x1 = -6
x2 = 1
sqrt(a^18) = -a^9
sqrt(64*(-a^9 )) = 8*(-a^(9\2))
4*sqrt(4*sqrt(2)) = 4*sqrt(2^(3\2)) = 2^(2+3\4) = 2^(11\4)
sqrt(8*sqrt3(4)) = sqrt(2^(3+2\3)) = 2^(11\6)
2^(11\4) делить на 2^(11\6) =
2^(11\4 - 11\6) = 2^(11\12)