Solutions to several cubic equations of one variable There are several univariate cubic equations The third power of X + 5x = 6 The third power of X + 2x = 19 The third power of X + 7x = 48 By the way, it's better to talk about the truth. It's OK without it
(1)x1=1
x2=0.44222-3.2553i
x3=0.42222-8.05123i
(2)x1=2.41936170320558
x2=0.12488-5.47955i
x3=0.12488-10.53523i
(3)x=3
x2=0.320436-7.214517i
x3=0.320436-14.6307155i
To solve the cubic equation x & # 179; + 2x-12 = 0
Obviously, when x = 2,
x³+2x=12,
That is, X & # 179; + 2x-12 = 0 has a root x = 2
therefore
x³+2x-12
=(x-2)(x^2+2x+6)=0
Obviously, x ^ 2 + 2x + 6 = 0 has no real solution,
So the root of the equation is only x = 2
To solve the binary linear equation: (1) 2x ^ 2-x-1 = 0 (2) 2x ^ 2 + 2X-4 = 0
To solve the binary linear equation: (1) 2x ^ 2-x-1 = 0
(2)2x^2+2x-4=0
This is twice a dollar
(1) Original formula: (2x + 1) (x-1) = 0
X = 1 or - 1 / 2
(2) Original formula: x ^ 2 + X-2 = 0
(x+2)(x-1)=0
X = - 2 or 1