раскрою скобки:
10x² - 14x = 2x²-5
8x² - 14x + 5 = 0
d = b²-4ac = 196 - 160 = 36 - уравнение имеет 2 корня.
x = (-b ± √d) / 2a;
x1 = 14 - 6 / 16 = 0.5
x2 = 14 + 6 / 16 = 20/16 = 1.25
раскрою скобки:
10x² - 14x = 2x²-5
8x² - 14x + 5 = 0
d = b²-4ac = 196 - 160 = 36 - уравнение имеет 2 корня.
x = (-b ± √d) / 2a;
x1 = 14 - 6 / 16 = 0.5
x2 = 14 + 6 / 16 = 20/16 = 1.25
ответ: x^4-10*x^3+31*x^2-31*x=0
Решаем по действиям:1. (x-3)^3=x^3-9*x^2+27*x-27 (x-3)^3=((x-3)*(x-3)*(x-3)) 1.1. (x-3)*(x-3)=x^2-6*x+9 (x-3)*(x-3)=x*x-x*3-3*x+3*3 1.1.1. x*x=x^2 x*x=x^(1+1) 1.1.1.1. 1+1=2 +1 _1_ 2 1.1.2. -x*3-3*x=-6*x 1.1.3. 3*3=9 X3 _3_ 9 1.2. (x^2-6*x+9)*(x-3)=x^3-9*x^2+27*x-27 (x^2-6*x+9)*(x-3)=x^2*x-x^2*3-6*x*x+6*x*3+9*x-9*3 1.2.1. x^2*x=x^3 x^2*x=x^(2+1) 1.2.1.1. 2+1=3 +2 _1_ 3 1.2.2. x*x=x^2 x*x=x^(1+1) 1.2.2.1. 1+1=2 +1 _1_ 2 1.2.3. -x^2*3-6*x^2=-9*x^2 1.2.4. 6*3=18 X6 _3_ 18 1.2.5. 18*x+9*x=27*x 1.2.6. 9*3=27 X9 _3_ 272. x*(x^3-9*x^2+27*x-27)=x^4-x^3*9+x^2*27-x*27 x*(x^3-9*x^2+27*x-27)=x*x^3-x*9*x^2+x*27*x-x*27 2.1. x*x^3=x^4 x*x^3=x^(1+3) 2.1.1. 1+3=4 +1 _3_ 4 2.2. x*x^2=x^3 x*x^2=x^(1+2) 2.2.1. 1+2=3 +1 _2_ 3 2.3. x*x=x^2 x*x=x^(1+1) 2.3.1. 1+1=2 +1 _1_ 23. (x-2)^2=x^2-4*x+4 (x-2)^2=((x-2)*(x-2)) 3.1. (x-2)*(x-2)=x^2-4*x+4 (x-2)*(x-2)=x*x-x*2-2*x+2*2 3.1.1. x*x=x^2 x*x=x^(1+1) 3.1.1.1. 1+1=2 +1 _1_ 2 3.1.2. -x*2-2*x=-4*x 3.1.3. 2*2=4 X2 _2_ 44. x*(x^2-4*x+4)=x^3-x^2*4+x*4 x*(x^2-4*x+4)=x*x^2-x*4*x+x*4 4.1. x*x^2=x^3 x*x^2=x^(1+2) 4.1.1. 1+2=3 +1 _2_ 3 4.2. x*x=x^2 x*x=x^(1+1) 4.2.1. 1+1=2 +1 _1_ 25. x^4-x^3*9+x^2*27-x*27-(x^3-x^2*4+x*4)=x^4-x^3*9+x^2*27-x*27-x^3+x^2*4-x*46. -x^3*9-x^3=-10*x^37. x^2*27+x^2*4=31*x^28. -x*27-x*4=-31*x
Решаем по шагам:1. x*(x^3-9*x^2+27*x-27)-x*(x-2)^2=0 1.1. (x-3)^3=x^3-9*x^2+27*x-27 (x-3)^3=((x-3)*(x-3)*(x-3)) 1.1.1. (x-3)*(x-3)=x^2-6*x+9 (x-3)*(x-3)=x*x-x*3-3*x+3*3 1.1.1.1. x*x=x^2 x*x=x^(1+1) 1.1.1.1.1. 1+1=2 +1 _1_ 2 1.1.1.2. -x*3-3*x=-6*x 1.1.1.3. 3*3=9 X3 _3_ 9 1.1.2. (x^2-6*x+9)*(x-3)=x^3-9*x^2+27*x-27 (x^2-6*x+9)*(x-3)=x^2*x-x^2*3-6*x*x+6*x*3+9*x-9*3 1.1.2.1. x^2*x=x^3 x^2*x=x^(2+1) 1.1.2.1.1. 2+1=3 +2 _1_ 3 1.1.2.2. x*x=x^2 x*x=x^(1+1) 1.1.2.2.1. 1+1=2 +1 _1_ 2 1.1.2.3. -x^2*3-6*x^2=-9*x^2 1.1.2.4. 6*3=18 X6 _3_ 18 1.1.2.5. 18*x+9*x=27*x 1.1.2.6. 9*3=27 X9 _3_ 272. x^4-x^3*9+x^2*27-x*27-x*(x-2)^2=0 2.1. x*(x^3-9*x^2+27*x-27)=x^4-x^3*9+x^2*27-x*27 x*(x^3-9*x^2+27*x-27)=x*x^3-x*9*x^2+x*27*x-x*27 2.1.1. x*x^3=x^4 x*x^3=x^(1+3) 2.1.1.1. 1+3=4 +1 _3_ 4 2.1.2. x*x^2=x^3 x*x^2=x^(1+2) 2.1.2.1. 1+2=3 +1 _2_ 3 2.1.3. x*x=x^2 x*x=x^(1+1) 2.1.3.1. 1+1=2 +1 _1_ 23. x^4-x^3*9+x^2*27-x*27-x*(x^2-4*x+4)=0 3.1. (x-2)^2=x^2-4*x+4 (x-2)^2=((x-2)*(x-2)) 3.1.1. (x-2)*(x-2)=x^2-4*x+4 (x-2)*(x-2)=x*x-x*2-2*x+2*2 3.1.1.1. x*x=x^2 x*x=x^(1+1) 3.1.1.1.1. 1+1=2 +1 _1_ 2 3.1.1.2. -x*2-2*x=-4*x 3.1.1.3. 2*2=4 X2 _2_ 44. x^4-x^3*9+x^2*27-x*27-(x^3-x^2*4+x*4)=0 4.1. x*(x^2-4*x+4)=x^3-x^2*4+x*4 x*(x^2-4*x+4)=x*x^2-x*4*x+x*4 4.1.1. x*x^2=x^3 x*x^2=x^(1+2) 4.1.1.1. 1+2=3 +1 _2_ 3 4.1.2. x*x=x^2 x*x=x^(1+1) 4.1.2.1. 1+1=2 +1 _1_ 25. x^4-x^3*9+x^2*27-x*27-x^3+x^2*4-x*4=0 5.1. x^4-x^3*9+x^2*27-x*27-(x^3-x^2*4+x*4)=x^4-x^3*9+x^2*27-x*27-x^3+x^2*4-x*46. x^4-10*x^3+x^2*27-x*27+x^2*4-x*4=0 6.1. -x^3*9-x^3=-10*x^37. x^4-10*x^3+31*x^2-x*27-x*4=0 7.1. x^2*27+x^2*4=31*x^28. x^4-10*x^3+31*x^2-31*x=0 8.1. -x*27-x*4=-31*x
Решаем уравнение x^4-10*x^3+31*x^2-31*x=0: Тестовая функция, правильность не гарантируетсяНе можем решить.