Square x plus 4x equals zero

Square x plus 4x equals zero

x²+4x=0
x(x+4)=0
X = 0 or x + 4 = 0
x=0,x=-4
0 or - 4
X^2+4X=0
X(X+4)=0
X = 0 or x + 4 = 0
X1=0，X2=-4
X=0
X = O or x = - 4
0 or negative 4
x^2+4x=0
x(x+4)=0
X1 = 0 or x2 = - 4
X = 0 or x = - 4
What is cos30 ° equal to
The root of two is three
What is the root sign three of sin 50 + cos 50
Use double angle
1/sin50°+√3/cos50°=（cos50°+√3sin50°）/sin50°*cos50° =4（1/2cos50°+√3sin50°）/2sin50°*cos50° =4sin（50°+30°）/sin100° =4sin80°/sin80° =4
1/sin50+√3/cos50 =(cos50+√3sin50)/(sin50cos50) =2*sin(30+50)/(sin100/2) =4sin80/sin100 =4
The square of x minus 4x plus 1 equals 0
Find x + 1 / 2 of X + 1 / 2 of X
X-4x + 1 = 0, x + 1 = 4x, divide X by both sides to get 1 / 4 of X + X, square of both sides to get 1 / 16-2 = 14 of X + 1 / X
Cos30? = what
cos30°=√3/2
Three in two
Mathematics (cos50 ° * tan50 °) - sin50 °
(cos50°*tan50°)-sin50°
=cos50°*sin50°/cos50°-sin50°
=sin50°-sin50°=0
tan50°=sin50°/cos50°
(cos50°*tan50°)-sin50°=cos50°*sin50°/cos50°-sin50°
=sin50°-sin50°
=0
Given the square of X-1 / 4x = X-1 / A + X + 1 / B, find the value of a and B
Given that the square of X is 4x = X-1 / A + X + 1 / B, find the values of a and B,
Multiply by (x + 1) (x-1)
4x=A(x+1)+B(x-1)
4x=(A+B)x+(A-B)
So a + B = 4
A-B=0
therefore
A=2,B=2
On the right
[(A+B)X+（A-B)]/(X²-1)
Left and right control
A + B = 4, A-B = 0
A=2,B=2
cos20°-cos40°-cos80°=______ .
Cos20 ° - cos40 ° - cos80 ° = cos20 ° - cos (60 ° - 20 °) - cos (60 ° + 20 °) = cos20 ° - (cos60 ° cos20 ° + sin60 ° sin20 °) - (cos60 ° cos20 ° - sin60 ° sin20 °) = cos20 ° - cos60 ° cos20 ° - sin60 ° sin20 ° - cos60 ° cos20 ° + sin60 ° sin20 ° = cos20 ° - 2cos60 ° cos20 ° = cos20 ° - cos20 ° = 0
What is 50 degrees
one point one nine one seven five three five nine three
one point zero five
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Given that the square of X - 4x + 1 = 0, find the square of x plus (1 / 2 of x)
X-4X+1=0 x+1/x=4 x+1/x=(x+1/x)-2=16-2=14
Because both sides of x ^ 2-4x + 1 = 0 are divided by X + 1 / x-4 = 0, x + 1 / x = 4, so (x + 1 / x) = x ^ 2 + 1 / x ^ 2 + 2 = 16, x ^ 2 + 1 / x ^ 2 = 14