z^2-9z-14=0

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


Simplifying
z2 + -9z + -14 = 0

Reorder the terms:
-14 + -9z + z2 = 0

Solving
-14 + -9z + z2 = 0

Solving for variable 'z'.

Begin completing the square.

Move the constant term to the right:

Add '14' to each side of the equation.
-14 + -9z + 14 + z2 = 0 + 14

Reorder the terms:
-14 + 14 + -9z + z2 = 0 + 14

Combine like terms: -14 + 14 = 0
0 + -9z + z2 = 0 + 14
-9z + z2 = 0 + 14

Combine like terms: 0 + 14 = 14
-9z + z2 = 14

The z term is -9z.  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.
-9z + 20.25 + z2 = 14 + 20.25

Reorder the terms:
20.25 + -9z + z2 = 14 + 20.25

Combine like terms: 14 + 20.25 = 34.25
20.25 + -9z + z2 = 34.25

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

Calculate the square root of the right side: 5.852349955

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

Subproblem 1

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

Subproblem 2

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

Solution

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

See similar equations:

| 11-4x=3-4x | | -n-15+3n=1 | | 1/2(5)(15-10)= | | abc-xy=z | | 3(7)+9=5(7)-5 | | 45=2v+7v | | 21x-28=4 | | 784/8 | | 4y+3-y-2+2h= | | -x=7+4 | | 1/3y=5/6 | | 4.3+.6x=1.2x+5.2 | | 3(3)+9=5(3)-5 | | 5(-3+5r)=-190 | | 54=-2(m+6)+m | | .20r+7r=3(4r+8) | | 5a+14a=9a-5 | | 11x+y=18 | | b/-12=1.9 | | 20+3x=5x+6.6 | | 9-44/3 | | 3u^2-29u+40=0 | | 3m+2m=60 | | 8y^2(y^2-4y+5)=0 | | 2x+5=3+2(x+l) | | 5(-3+5r)=190 | | 3+6-2x=-6 | | 7x+8=-2x+107 | | 4/I-6=22 | | 7.7/37 | | 4(1x-1)=1/2(1x-8) | | X+37=3x |

Equations solver categories