x*x-10*x+18=0

Simple and best practice solution for x*x-10*x+18=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*x-10*x+18=0 equation:


Simplifying
x * x + -10x + 18 = 0

Multiply x * x
x2 + -10x + 18 = 0

Reorder the terms:
18 + -10x + x2 = 0

Solving
18 + -10x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-18' to each side of the equation.
18 + -10x + -18 + x2 = 0 + -18

Reorder the terms:
18 + -18 + -10x + x2 = 0 + -18

Combine like terms: 18 + -18 = 0
0 + -10x + x2 = 0 + -18
-10x + x2 = 0 + -18

Combine like terms: 0 + -18 = -18
-10x + x2 = -18

The x term is -10x.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10x + 25 + x2 = -18 + 25

Reorder the terms:
25 + -10x + x2 = -18 + 25

Combine like terms: -18 + 25 = 7
25 + -10x + x2 = 7

Factor a perfect square on the left side:
(x + -5)(x + -5) = 7

Calculate the square root of the right side: 2.645751311

Break this problem into two subproblems by setting 
(x + -5) equal to 2.645751311 and -2.645751311.

Subproblem 1

x + -5 = 2.645751311 Simplifying x + -5 = 2.645751311 Reorder the terms: -5 + x = 2.645751311 Solving -5 + x = 2.645751311 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = 2.645751311 + 5 Combine like terms: -5 + 5 = 0 0 + x = 2.645751311 + 5 x = 2.645751311 + 5 Combine like terms: 2.645751311 + 5 = 7.645751311 x = 7.645751311 Simplifying x = 7.645751311

Subproblem 2

x + -5 = -2.645751311 Simplifying x + -5 = -2.645751311 Reorder the terms: -5 + x = -2.645751311 Solving -5 + x = -2.645751311 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = -2.645751311 + 5 Combine like terms: -5 + 5 = 0 0 + x = -2.645751311 + 5 x = -2.645751311 + 5 Combine like terms: -2.645751311 + 5 = 2.354248689 x = 2.354248689 Simplifying x = 2.354248689

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.645751311, 2.354248689}

See similar equations:

| A*B=A+2B | | -5(2t+7)=-75 | | 6q-2p-3=22p-2q+13 | | -10(s+5)=-114 | | (14x-7)-(4x^2+2x-7)= | | 7(2l+9)=91 | | f(x)=1-x-(1/x) | | X-5x/7 | | (3x^2)/2=27/2 | | 32y^2x=4x | | .75x+.25y=8 | | 5x^2-9=-10 | | 7.5x+2.5y=8 | | 5t-1=10 | | 9m+7=81 | | 6x(2+9x)= | | 5(x+9)=4(2x-6) | | 12/11*2/4 | | 3(2x)-4=188 | | 5x^2/15-(x-9)/6=3/2 | | 55+x=2x+3 | | Fx=6x-3 | | x=2+3i | | x-(0.25x)=650 | | 3^3/5=12/25z | | 1/40=1/8y | | (-4p^7)/(28p^4) | | -2-(4-9)= | | 12d^2+d-6=0 | | x+10x=285 | | 5x-1=3+3 | | -(x^2-13x)=-(3x^2-5x) |

Equations solver categories