2x^2-16x-5=0

Simple and best practice solution for 2x^2-16x-5=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 2x^2-16x-5=0 equation:


Simplifying
2x2 + -16x + -5 = 0

Reorder the terms:
-5 + -16x + 2x2 = 0

Solving
-5 + -16x + 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'.
-2.5 + -8x + x2 = 0

Move the constant term to the right:

Add '2.5' to each side of the equation.
-2.5 + -8x + 2.5 + x2 = 0 + 2.5

Reorder the terms:
-2.5 + 2.5 + -8x + x2 = 0 + 2.5

Combine like terms: -2.5 + 2.5 = 0.0
0.0 + -8x + x2 = 0 + 2.5
-8x + x2 = 0 + 2.5

Combine like terms: 0 + 2.5 = 2.5
-8x + x2 = 2.5

The x term is -8x.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8x + 16 + x2 = 2.5 + 16

Reorder the terms:
16 + -8x + x2 = 2.5 + 16

Combine like terms: 2.5 + 16 = 18.5
16 + -8x + x2 = 18.5

Factor a perfect square on the left side:
(x + -4)(x + -4) = 18.5

Calculate the square root of the right side: 4.301162634

Break this problem into two subproblems by setting 
(x + -4) equal to 4.301162634 and -4.301162634.

Subproblem 1

x + -4 = 4.301162634 Simplifying x + -4 = 4.301162634 Reorder the terms: -4 + x = 4.301162634 Solving -4 + x = 4.301162634 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 4.301162634 + 4 Combine like terms: -4 + 4 = 0 0 + x = 4.301162634 + 4 x = 4.301162634 + 4 Combine like terms: 4.301162634 + 4 = 8.301162634 x = 8.301162634 Simplifying x = 8.301162634

Subproblem 2

x + -4 = -4.301162634 Simplifying x + -4 = -4.301162634 Reorder the terms: -4 + x = -4.301162634 Solving -4 + x = -4.301162634 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -4.301162634 + 4 Combine like terms: -4 + 4 = 0 0 + x = -4.301162634 + 4 x = -4.301162634 + 4 Combine like terms: -4.301162634 + 4 = -0.301162634 x = -0.301162634 Simplifying x = -0.301162634

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.301162634, -0.301162634}

See similar equations:

| 22=4m | | 4x+5x-16=32-7x | | 8x-3+5=3x+22+4x | | -2x-18=16 | | 3x^4+12x^2-2=0 | | 3m^2-20m-63=0 | | 3(0)-3y=-3 | | 4x-20=36-3 | | x+(x*.24)=37 | | 9x=7200 | | 3(1)-3y=-3 | | 10b-20b-30=0 | | X/.4=50000 | | F(x)=x^4+2x^3-43x^2-44x+84 | | 9-3n=3 | | Y=1/3sin3x | | 4y=0+4 | | 170p+60c=2700 | | v=gr^2h | | 1995-1987= | | 56-x+5=48 | | 3x+6*14=18*3x | | 20-x+3=18 | | 45-x+10=20 | | 30-x+20=45 | | 2b^2+4b=70 | | -2(3v-7)+8v=4+5(4v-1) | | 6(8b+3)-5= | | 40-20+x=43 | | 6x=2x+48 | | 2x-4*x+6=0 | | 6x=1x+35 |

Equations solver categories