3х²-2х=0 ⇒ Х (3х-2)=0⇒ х₁=0 х₂ = 2/3
2Х²+3Х=Х² ⇒ 2Х²-Х²+3Х=0⇒ Х²+3Х=0 ⇒ Х(Х+3) =0 ⇒ Х₁=0, Х₂ =-3
X^2-2x-2=0
..................
(6 3/8-2 3/4)*(-4)+7/18*9=(51/8-11/4)*(-4)+63/18=(51/8-22/8)*(-)+63/18=29/8*(-4)+63/18=-116/8+63/18=-29/2+7/2=-22/2=-11
A11=a1+10d
-5.4=3+10d
-8.4=10d
d=-8.4/10
d=-0.84
-27=3+x(-0.84)
-30=x(-0.84)
x=30/0.84
x=3000/84
x=35.7142857
tak chto ne yavlyaetsa
1) t³ - b³ = (t - b)(t² + tb + b²)
2) z³ + 27 = z³ + 3³ = (z + 3)(z² - 3z + 9)