x^2+8x-17=0

Simple and best practice solution for x^2+8x-17=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 x^2+8x-17=0 equation:


Simplifying
x2 + 8x + -17 = 0

Reorder the terms:
-17 + 8x + x2 = 0

Solving
-17 + 8x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '17' to each side of the equation.
-17 + 8x + 17 + x2 = 0 + 17

Reorder the terms:
-17 + 17 + 8x + x2 = 0 + 17

Combine like terms: -17 + 17 = 0
0 + 8x + x2 = 0 + 17
8x + x2 = 0 + 17

Combine like terms: 0 + 17 = 17
8x + x2 = 17

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 = 17 + 16

Reorder the terms:
16 + 8x + x2 = 17 + 16

Combine like terms: 17 + 16 = 33
16 + 8x + x2 = 33

Factor a perfect square on the left side:
(x + 4)(x + 4) = 33

Calculate the square root of the right side: 5.744562647

Break this problem into two subproblems by setting 
(x + 4) equal to 5.744562647 and -5.744562647.

Subproblem 1

x + 4 = 5.744562647 Simplifying x + 4 = 5.744562647 Reorder the terms: 4 + x = 5.744562647 Solving 4 + x = 5.744562647 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 = 5.744562647 + -4 Combine like terms: 4 + -4 = 0 0 + x = 5.744562647 + -4 x = 5.744562647 + -4 Combine like terms: 5.744562647 + -4 = 1.744562647 x = 1.744562647 Simplifying x = 1.744562647

Subproblem 2

x + 4 = -5.744562647 Simplifying x + 4 = -5.744562647 Reorder the terms: 4 + x = -5.744562647 Solving 4 + x = -5.744562647 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 = -5.744562647 + -4 Combine like terms: 4 + -4 = 0 0 + x = -5.744562647 + -4 x = -5.744562647 + -4 Combine like terms: -5.744562647 + -4 = -9.744562647 x = -9.744562647 Simplifying x = -9.744562647

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.744562647, -9.744562647}

See similar equations:

| 9[d-1]+d=11 | | 8y(2y-12)=0 | | 9y-19=2y+2 | | 2(3x-4)=4(x+3)+6 | | x^2+21x-22=3x-10 | | 11q-16=6q+4 | | y=-3x^2+12x-20 | | -7(s+-3)+-11=-46 | | x(2x+1)=210 | | 3x^3+9x^2+2x= | | -2t-34+-6t=-10 | | (x+2)(x-2)=96 | | 15x^2=450 | | -7x+6y=9 | | 3-8x+16=9-8x-20 | | 1+6x+9= | | (x-4)(x-4)=64 | | x^2+5x+8=4 | | x^2-10x-30=0 | | 2x+x=45 | | 4x^2-7x=9 | | x+x^2=30 | | 5(x-2)=3(2x+4) | | -4(1+9k)=-8(5k+6) | | p^2-5p=-4 | | 2(w-2+8)+2w=72 | | 3(-7r)-3=3(-5r-12) | | 24=4[k+1]-k | | -45+1.98=27 | | x^2+5x+5=x+1 | | 3x^2-3x-8=2x^2+2 | | 8x^2-9x-14=0 |

Equations solver categories