x²(x² -3x + 1) -2x(x³ - 3x² + x) + x⁴ - 3x³ + x² = x⁴ - 3x³ + x² - 2x⁴ +6x³ - 2x² +
+ x⁴ - 3x³ + x² = 0
1) (- 3n² + 2n + 1)(3n² + 2n - 1) = - 9n⁴ - 6n³ + 3n² + 6n³ + 4n² - 2n + 3n² +
+ 2n - 1 = - 9n⁴ + 10n² - 1
2) (2 + a - a³ + a⁵)(a - 1) = 2a - 2 +a² - a - a⁴ + a³ + a⁶ - a⁵ = a⁶ - a⁵ - a⁴ + a³ +
+ a² + a - 2
3) (x + 1)(x² - x + 1)(x⁶ - x³ + 1) = (x³ + 1)(x⁶ - x³ + 1) = x⁹ - x⁶ + x³ + x⁶ - x³+ 1=
= x⁹ + 1
1) (m - 1)(m + 4) = m² + 3m - 4
2) (a + 3)(a - 2) = a² + a - 6
(x-2)(x+2)-(x-5)ˇ2=xˇ2-4-xˇ2+10x-25=10x-29
Возведем в квадрат, получится
(x+1)^2=(x-1)(2x-1)
x^2+2x+1=2x^2-3x+1
-x^2+5x=0
-x(x-5)=0
x=5
x=0
1 [x]([x]-4)=0;x=4;-4;0
2 [x](2[x]-5)=0;x=0;2.5;-2.5;
3 [x](5[x]-7)=0;x=0;x=1.4;x=-1.4
4 [x](9[x]+3)=0;x=0;