Х - 7/9х = 3,6
9/9х - 7/9х = 3,6
2/9х = 3,6
х = 3,6 / 2 * 9
х = 16,2
4 * 4 = 16 метров в квадрате
16 * 10 = 160 дм
895 * 895 = 801025 дм
160 - 801025 = -800865
А.х=0,5,-5
Б.х=4,6
В.
<span>x1=(- term1 + r13*cos(q3/3) )
x2=(- term1 + r13*cos(q3+(2*Π)/3) )
x3=(- term1 + r13*cos(q3+(4*Π)/3) )
</span>
Где discriminant(Δ) = q3 + r2
term1 = √(3.0)*((-t + s)/2)
r13= 2 * √(q)
q = (3c- b2)/9
r = -27d + b(9c-2b2<span>)
s = r + √(discriminant)
t = r - √(discriminant)</span>