4x^2-9x-17=0

Simple and best practice solution for 4x^2-9x-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^2-9x-17=0 equation:


Simplifying
4x2 + -9x + -17 = 0

Reorder the terms:
-17 + -9x + 4x2 = 0

Solving
-17 + -9x + 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 + -2.25x + x2 = 0

Move the constant term to the right:

Add '4.25' to each side of the equation.
-4.25 + -2.25x + 4.25 + x2 = 0 + 4.25

Reorder the terms:
-4.25 + 4.25 + -2.25x + x2 = 0 + 4.25

Combine like terms: -4.25 + 4.25 = 0.00
0.00 + -2.25x + x2 = 0 + 4.25
-2.25x + x2 = 0 + 4.25

Combine like terms: 0 + 4.25 = 4.25
-2.25x + x2 = 4.25

The x term is -2.25x.  Take half its coefficient (-1.125).
Square it (1.265625) and add it to both sides.

Add '1.265625' to each side of the equation.
-2.25x + 1.265625 + x2 = 4.25 + 1.265625

Reorder the terms:
1.265625 + -2.25x + x2 = 4.25 + 1.265625

Combine like terms: 4.25 + 1.265625 = 5.515625
1.265625 + -2.25x + x2 = 5.515625

Factor a perfect square on the left side:
(x + -1.125)(x + -1.125) = 5.515625

Calculate the square root of the right side: 2.348536779

Break this problem into two subproblems by setting 
(x + -1.125) equal to 2.348536779 and -2.348536779.

Subproblem 1

x + -1.125 = 2.348536779 Simplifying x + -1.125 = 2.348536779 Reorder the terms: -1.125 + x = 2.348536779 Solving -1.125 + x = 2.348536779 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.125' to each side of the equation. -1.125 + 1.125 + x = 2.348536779 + 1.125 Combine like terms: -1.125 + 1.125 = 0.000 0.000 + x = 2.348536779 + 1.125 x = 2.348536779 + 1.125 Combine like terms: 2.348536779 + 1.125 = 3.473536779 x = 3.473536779 Simplifying x = 3.473536779

Subproblem 2

x + -1.125 = -2.348536779 Simplifying x + -1.125 = -2.348536779 Reorder the terms: -1.125 + x = -2.348536779 Solving -1.125 + x = -2.348536779 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.125' to each side of the equation. -1.125 + 1.125 + x = -2.348536779 + 1.125 Combine like terms: -1.125 + 1.125 = 0.000 0.000 + x = -2.348536779 + 1.125 x = -2.348536779 + 1.125 Combine like terms: -2.348536779 + 1.125 = -1.223536779 x = -1.223536779 Simplifying x = -1.223536779

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.473536779, -1.223536779}

See similar equations:

| 26+17x=11x+23 | | 11r+19=1-12r+6 | | -14z=14-12z | | p-9=15-2p | | 3=x+6-1 | | 6h-10=10+10h | | 17(100)+22x=3086 | | -7t=-4t+9 | | 1=3-m | | f(x)=-2x^2+12x-14 | | -9-8n=8-5n+7 | | 0.5(x+1)+1=0.2 | | 2x+(-89)=110 | | (x^3/4*y^1/8*z^1/6) | | -94+41x+3x^2=0 | | x^15=3.5 | | 4x^8/16x^8 | | 3x/5=1/2 | | 4(r+3)=-16 | | x^2-20x+101=0 | | 10-4g=5g-8 | | -m+6=-2m | | 3+q=8 | | 8+7j=4j-10 | | q/185 | | 5x+2=-1+13 | | X+2-3=2 | | 3=-20x+4 | | 7d=6+8d | | 4=5-m | | 8x+-19=77 | | (8u^5)(9u)(2u^10)= |

Equations solver categories