0.5x^2-3x-8=0

Simple and best practice solution for 0.5x^2-3x-8=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 0.5x^2-3x-8=0 equation:


Simplifying
0.5x2 + -3x + -8 = 0

Reorder the terms:
-8 + -3x + 0.5x2 = 0

Solving
-8 + -3x + 0.5x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.5'.
-16 + -6x + x2 = 0

Move the constant term to the right:

Add '16' to each side of the equation.
-16 + -6x + 16 + x2 = 0 + 16

Reorder the terms:
-16 + 16 + -6x + x2 = 0 + 16

Combine like terms: -16 + 16 = 0
0 + -6x + x2 = 0 + 16
-6x + x2 = 0 + 16

Combine like terms: 0 + 16 = 16
-6x + x2 = 16

The x term is -6x.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6x + 9 + x2 = 16 + 9

Reorder the terms:
9 + -6x + x2 = 16 + 9

Combine like terms: 16 + 9 = 25
9 + -6x + x2 = 25

Factor a perfect square on the left side:
(x + -3)(x + -3) = 25

Calculate the square root of the right side: 5

Break this problem into two subproblems by setting 
(x + -3) equal to 5 and -5.

Subproblem 1

x + -3 = 5 Simplifying x + -3 = 5 Reorder the terms: -3 + x = 5 Solving -3 + x = 5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = 5 + 3 Combine like terms: -3 + 3 = 0 0 + x = 5 + 3 x = 5 + 3 Combine like terms: 5 + 3 = 8 x = 8 Simplifying x = 8

Subproblem 2

x + -3 = -5 Simplifying x + -3 = -5 Reorder the terms: -3 + x = -5 Solving -3 + x = -5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = -5 + 3 Combine like terms: -3 + 3 = 0 0 + x = -5 + 3 x = -5 + 3 Combine like terms: -5 + 3 = -2 x = -2 Simplifying x = -2

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8, -2}

See similar equations:

| 4a^2= | | 4x-2(3)=16 | | 4x-2(-2)=16 | | 7(x-3)=-7 | | y^3-y^2=16y-16 | | 7=2.2+z | | 5x-22=3 | | 47-6x=3x+18 | | -5.2f=-41.6 | | -(p-7)=-(4p+8) | | 15x-2x+22=10 | | X^3-10x^2-9x-22=0 | | 4x-2x=16 | | 10-7x=70-35x | | -28.8=-3.6k | | -3.8=b+3.9 | | -26=-2.6x | | 3x^3-7x^2+27x-9=0 | | 2x+4x+8=32 | | -12v-50=-2(6v+8) | | 5x-(3x+1)=2x+4 | | 1/4(x+2)=3/2 | | -6.4v=44.8 | | 4x-12+6x-17+2x+5=180 | | 0.7z+1.9+0.1z=5.5+0.4z | | 20t^2-17t-63=0 | | y+4.8=-5.2 | | X-15=60 | | 10=2.6+d | | (5x-20)+(3x+8)=180 | | 8x-19=5x+11 | | 5y-5x=35 |

Equations solver categories