.5x^2-3x-8=0

Simple and best practice solution for .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 .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:

| 2/3(7/8-4x)-5/8=3/8 | | =5146496247 | | 12x+8=6x+4+6x+4 | | 8x+5=4x+7 | | 10=4+10Xy | | d=-1.5t^2+120 | | 4x^3-12x^2+112=0 | | .5x+15=23 | | 7x+16=7x+16 | | 3x+8=3x+7 | | Q^2+22q+88= | | 7x+y=42000 | | 23x-6-17x+2=17x-4-11x+12 | | 4(x-3)+54=-3x | | -81x-80=t | | 9n^2=16 | | 4(x+9)=4x+36 | | 4x=y-1 | | 0.10(99-x)+.25(x)=12.75 | | 50+12(m-1)=m-17 | | 9x+8=3x-16 | | 4(3x+2)-18=24 | | 5x-5=14x+59 | | mx+my= | | 65+14(x-2)=x-28 | | 2+(4h-1)=11+2h | | 35+8(m-4)=43 | | -8x-15=-11 | | 14+7(m-3)=28 | | 3a+2b=30 | | 1+n=-9 | | 9x-(6x-3)=12 |

Equations solver categories