x^2-9x-14=0

Simple and best practice solution for x^2-9x-14=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^2-9x-14=0 equation:


Simplifying
x2 + -9x + -14 = 0

Reorder the terms:
-14 + -9x + x2 = 0

Solving
-14 + -9x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '14' to each side of the equation.
-14 + -9x + 14 + x2 = 0 + 14

Reorder the terms:
-14 + 14 + -9x + x2 = 0 + 14

Combine like terms: -14 + 14 = 0
0 + -9x + x2 = 0 + 14
-9x + x2 = 0 + 14

Combine like terms: 0 + 14 = 14
-9x + x2 = 14

The x term is -9x.  Take half its coefficient (-4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
-9x + 20.25 + x2 = 14 + 20.25

Reorder the terms:
20.25 + -9x + x2 = 14 + 20.25

Combine like terms: 14 + 20.25 = 34.25
20.25 + -9x + x2 = 34.25

Factor a perfect square on the left side:
(x + -4.5)(x + -4.5) = 34.25

Calculate the square root of the right side: 5.852349955

Break this problem into two subproblems by setting 
(x + -4.5) equal to 5.852349955 and -5.852349955.

Subproblem 1

x + -4.5 = 5.852349955 Simplifying x + -4.5 = 5.852349955 Reorder the terms: -4.5 + x = 5.852349955 Solving -4.5 + x = 5.852349955 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = 5.852349955 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = 5.852349955 + 4.5 x = 5.852349955 + 4.5 Combine like terms: 5.852349955 + 4.5 = 10.352349955 x = 10.352349955 Simplifying x = 10.352349955

Subproblem 2

x + -4.5 = -5.852349955 Simplifying x + -4.5 = -5.852349955 Reorder the terms: -4.5 + x = -5.852349955 Solving -4.5 + x = -5.852349955 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = -5.852349955 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = -5.852349955 + 4.5 x = -5.852349955 + 4.5 Combine like terms: -5.852349955 + 4.5 = -1.352349955 x = -1.352349955 Simplifying x = -1.352349955

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.352349955, -1.352349955}

See similar equations:

| 7t-2=0 | | 2x+2x+x+x=150 | | 3x^2-5x+7=0 | | 2x+11=y | | 3x^2-5x=7+0 | | x^2-2x+9=89 | | 4x+3.7y=-85 | | x^2-2x-5=42 | | .90(52)+x=c | | 2.5*0.2=8.1 | | x+.90x=52 | | 17x-13y-2= | | 4-7m=-3+4 | | 5r=8 | | 26x+63y=4 | | 210+.25x=355 | | 8(-8x-6)=-6x-22 | | (.4x+.2)(x+.6)= | | -3+4=-1 | | 4x+5(5x-5)=81 | | 2q+365=873 | | xxx-11x=26 | | 19x-2-7x=31x+6x-15 | | -8(-8x-6)=-6v-22 | | .05(60)-0.01(50)=2.5 | | 2(x-5)+3x=50 | | 6x-7=6(x+7) | | 11x+13=7x-7+9x | | (y-5)(y+5)= | | .23x+.14y=20.8 | | 10(z+3)-3(z-1)=4(z-1)+2(z-3) | | 0.05(50+0.2y)-0.01y=2.5 |

Equations solver categories