=(-2х²+7х-3)/(2x²-x)=-2(x-0,5)(x-3)/x(2x-1)=(3-x)(2x-1)/x(2x-1)=(3-x)/x
Х:6=36
х=36•6=216
2 .16х=64
х=4
f(x) = 4x² - x +6
f(sinx) = 4sin²x - sinx + 6 = 4(1 - cos²x) - sinx + 6 =
= 4 - 4cos²x - sinx + 6 = 10 - 4cos²x - sinx
Ответ: Верно.
0.6x^2-1.2x-5.4=0.6x^2+0.9x-0.6x-0.9
-1.2x-0.3x=-0.9+5.4
-1.5x=4.5
x=-3