4x^2-8x-17=0

Simple and best practice solution for 4x^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 4x^2-8x-17=0 equation:


Simplifying
4x2 + -8x + -17 = 0

Reorder the terms:
-17 + -8x + 4x2 = 0

Solving
-17 + -8x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
-4.25 + -2x + x2 = 0

Move the constant term to the right:

Add '4.25' to each side of the equation.
-4.25 + -2x + 4.25 + x2 = 0 + 4.25

Reorder the terms:
-4.25 + 4.25 + -2x + x2 = 0 + 4.25

Combine like terms: -4.25 + 4.25 = 0.00
0.00 + -2x + x2 = 0 + 4.25
-2x + x2 = 0 + 4.25

Combine like terms: 0 + 4.25 = 4.25
-2x + x2 = 4.25

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 4.25 + 1

Reorder the terms:
1 + -2x + x2 = 4.25 + 1

Combine like terms: 4.25 + 1 = 5.25
1 + -2x + x2 = 5.25

Factor a perfect square on the left side:
(x + -1)(x + -1) = 5.25

Calculate the square root of the right side: 2.291287847

Break this problem into two subproblems by setting 
(x + -1) equal to 2.291287847 and -2.291287847.

Subproblem 1

x + -1 = 2.291287847 Simplifying x + -1 = 2.291287847 Reorder the terms: -1 + x = 2.291287847 Solving -1 + x = 2.291287847 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 2.291287847 + 1 Combine like terms: -1 + 1 = 0 0 + x = 2.291287847 + 1 x = 2.291287847 + 1 Combine like terms: 2.291287847 + 1 = 3.291287847 x = 3.291287847 Simplifying x = 3.291287847

Subproblem 2

x + -1 = -2.291287847 Simplifying x + -1 = -2.291287847 Reorder the terms: -1 + x = -2.291287847 Solving -1 + x = -2.291287847 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -2.291287847 + 1 Combine like terms: -1 + 1 = 0 0 + x = -2.291287847 + 1 x = -2.291287847 + 1 Combine like terms: -2.291287847 + 1 = -1.291287847 x = -1.291287847 Simplifying x = -1.291287847

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.291287847, -1.291287847}

See similar equations:

| 5+x=17-2*x | | (24x)(43x)=8x+42 | | 5+12=17-(2*x) | | 3x^2+24=0 | | 6x^2+51x=27 | | 6x^2+51x=21 | | 11=2y-7 | | 7*(a-5)=63 | | 0=100x-5x^2 | | 15x^2+55x=20 | | 66.8*2*30= | | 2(q+4)+3=15 | | 10+x=-2x-5 | | (yz+6)(yz-6)= | | 12x+7=9x+10 | | 7z-6z=4z+8+7z | | m/8=4 | | 5y+15(y+1)=35 | | z+2z=-8z+4+9z | | 7x+5=7+6x | | j^2+4j+4=0 | | 15x^2+55=20 | | -7y-21=1-6y | | 5(x-1)+2x=2(x+2)+6 | | 3x+4x(3-5x)=2 | | 4+2x=4x+24 | | 2x+9=16-5x | | 90+-15= | | x^2-97x+1296=0 | | 3(x+2)+2(2x-3)=x-12 | | 4n^2-n-6=0 | | -4x-5=-11+2x |

Equations solver categories