5x^2-8x-3=

Simple and best practice solution for 5x^2-8x-3= 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^2-8x-3= equation:


Simplifying
5x2 + -8x + -3 = 0

Reorder the terms:
-3 + -8x + 5x2 = 0

Solving
-3 + -8x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
-0.6 + -1.6x + x2 = 0

Move the constant term to the right:

Add '0.6' to each side of the equation.
-0.6 + -1.6x + 0.6 + x2 = 0 + 0.6

Reorder the terms:
-0.6 + 0.6 + -1.6x + x2 = 0 + 0.6

Combine like terms: -0.6 + 0.6 = 0.0
0.0 + -1.6x + x2 = 0 + 0.6
-1.6x + x2 = 0 + 0.6

Combine like terms: 0 + 0.6 = 0.6
-1.6x + x2 = 0.6

The x term is -1.6x.  Take half its coefficient (-0.8).
Square it (0.64) and add it to both sides.

Add '0.64' to each side of the equation.
-1.6x + 0.64 + x2 = 0.6 + 0.64

Reorder the terms:
0.64 + -1.6x + x2 = 0.6 + 0.64

Combine like terms: 0.6 + 0.64 = 1.24
0.64 + -1.6x + x2 = 1.24

Factor a perfect square on the left side:
(x + -0.8)(x + -0.8) = 1.24

Calculate the square root of the right side: 1.113552873

Break this problem into two subproblems by setting 
(x + -0.8) equal to 1.113552873 and -1.113552873.

Subproblem 1

x + -0.8 = 1.113552873 Simplifying x + -0.8 = 1.113552873 Reorder the terms: -0.8 + x = 1.113552873 Solving -0.8 + x = 1.113552873 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.8' to each side of the equation. -0.8 + 0.8 + x = 1.113552873 + 0.8 Combine like terms: -0.8 + 0.8 = 0.0 0.0 + x = 1.113552873 + 0.8 x = 1.113552873 + 0.8 Combine like terms: 1.113552873 + 0.8 = 1.913552873 x = 1.913552873 Simplifying x = 1.913552873

Subproblem 2

x + -0.8 = -1.113552873 Simplifying x + -0.8 = -1.113552873 Reorder the terms: -0.8 + x = -1.113552873 Solving -0.8 + x = -1.113552873 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.8' to each side of the equation. -0.8 + 0.8 + x = -1.113552873 + 0.8 Combine like terms: -0.8 + 0.8 = 0.0 0.0 + x = -1.113552873 + 0.8 x = -1.113552873 + 0.8 Combine like terms: -1.113552873 + 0.8 = -0.313552873 x = -0.313552873 Simplifying x = -0.313552873

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.913552873, -0.313552873}

See similar equations:

| 5(w+1)-7=3(w-1)+2w | | (4x+5)(x-6)=12x+15 | | 5/8=a | | 5v^2-35v=0 | | 7+5x+4y+2z= | | 14=6x-5 | | 45+36v=66+23v+31 | | -1/1-6 | | -6x-12= | | 0.3t^2+0.1t=0.2 | | 9y-3-5y=5y-2 | | z=m/3(B+b) | | -4d+2d(3+d)=-14 | | 8x-19y=17 | | -27+(-41)= | | t+0.03t= | | 4y+12=56 | | x+5=-x | | 7x-3x+2x=39 | | -(4y+7)+9= | | 5x-(x+3)=.33(9x+18)-5 | | 3x+2x-6x=x+14 | | 5t-3/2 | | 6x+4=-2x+28 | | p(3p+14)-5=0 | | 97=4x+9y | | 7(y-9)=-3(7+y) | | X+20/30=5/6 | | 7+9=287 | | 6(3x+12)=42 | | -13-(6s-5)= | | 42y^2-16y+3=0 |

Equations solver categories