5x-2x^2-4=0

Simple and best practice solution for 5x-2x^2-4=0 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for 5x-2x^2-4=0 equation:


Simplifying
5x + -2x2 + -4 = 0

Reorder the terms:
-4 + 5x + -2x2 = 0

Solving
-4 + 5x + -2x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
2 + -2.5x + x2 = 0

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + -2.5x + -2 + x2 = 0 + -2

Reorder the terms:
2 + -2 + -2.5x + x2 = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -2.5x + x2 = 0 + -2
-2.5x + x2 = 0 + -2

Combine like terms: 0 + -2 = -2
-2.5x + x2 = -2

The x term is -2.5x.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5x + 1.5625 + x2 = -2 + 1.5625

Reorder the terms:
1.5625 + -2.5x + x2 = -2 + 1.5625

Combine like terms: -2 + 1.5625 = -0.4375
1.5625 + -2.5x + x2 = -0.4375

Factor a perfect square on the left side:
(x + -1.25)(x + -1.25) = -0.4375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 55-6x=3x+17 | | -6(x+6)+6(2x+1)= | | 7(x+5)-2= | | 4-2x+7x^2=0 | | -5-10x=29-24x | | 6+9x-3x=18-6 | | 8x-20= | | x/-6=-5-(-6) | | ax+bx+11=12 | | 4x-3:3-2x=5x-1:4+6 | | -4x-68=3x+30 | | 6-3b= | | 8x^2-4x^2= | | -7=5x+3 | | 10(w+3)+w= | | -2(5p-4)+6(8p-1)= | | 42=6t-13t | | 3x+10=-2x+170-40 | | 7(2x+4)= | | X/10=7/20 | | 112/8= | | 7x/6+x/2=10 | | 2x^2+15xy-27y^2=0 | | 2.3x-1.6=8.8-2.9x | | 3x^2+14xy+15y^2=0 | | 12x-87=25+4x | | 3x+14xy+15y^2=0 | | 36=-4p(2p-3) | | -x-19=-3x+37 | | 2/7(3+2a)=10/7 | | 4x+6y=2600 | | -7/6(18y+24z) |

Equations solver categories