9x^2-90x+145=0

Simple and best practice solution for 9x^2-90x+145=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 9x^2-90x+145=0 equation:


Simplifying
9x2 + -90x + 145 = 0

Reorder the terms:
145 + -90x + 9x2 = 0

Solving
145 + -90x + 9x2 = 0

Solving for variable 'x'.

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

Divide each side by '9'.
16.11111111 + -10x + x2 = 0

Move the constant term to the right:

Add '-16.11111111' to each side of the equation.
16.11111111 + -10x + -16.11111111 + x2 = 0 + -16.11111111

Reorder the terms:
16.11111111 + -16.11111111 + -10x + x2 = 0 + -16.11111111

Combine like terms: 16.11111111 + -16.11111111 = 0.00000000
0.00000000 + -10x + x2 = 0 + -16.11111111
-10x + x2 = 0 + -16.11111111

Combine like terms: 0 + -16.11111111 = -16.11111111
-10x + x2 = -16.11111111

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 = -16.11111111 + 25

Reorder the terms:
25 + -10x + x2 = -16.11111111 + 25

Combine like terms: -16.11111111 + 25 = 8.88888889
25 + -10x + x2 = 8.88888889

Factor a perfect square on the left side:
(x + -5)(x + -5) = 8.88888889

Calculate the square root of the right side: 2.98142397

Break this problem into two subproblems by setting 
(x + -5) equal to 2.98142397 and -2.98142397.

Subproblem 1

x + -5 = 2.98142397 Simplifying x + -5 = 2.98142397 Reorder the terms: -5 + x = 2.98142397 Solving -5 + x = 2.98142397 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 = 2.98142397 + 5 Combine like terms: -5 + 5 = 0 0 + x = 2.98142397 + 5 x = 2.98142397 + 5 Combine like terms: 2.98142397 + 5 = 7.98142397 x = 7.98142397 Simplifying x = 7.98142397

Subproblem 2

x + -5 = -2.98142397 Simplifying x + -5 = -2.98142397 Reorder the terms: -5 + x = -2.98142397 Solving -5 + x = -2.98142397 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 = -2.98142397 + 5 Combine like terms: -5 + 5 = 0 0 + x = -2.98142397 + 5 x = -2.98142397 + 5 Combine like terms: -2.98142397 + 5 = 2.01857603 x = 2.01857603 Simplifying x = 2.01857603

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.98142397, 2.01857603}

See similar equations:

| 6x+10x=123 | | ab-2a+3b-6= | | 16x^2+25Y^2= | | 8g+g=810 | | -6u+2(u-5)=-38 | | -2[12-2x]=18 | | -5(x+9)-41=1-47 | | 24.5= | | 51=(6a-3) | | f+f+f+f= | | 5y+y=60 | | -10+5+4-5=7x-5 | | 7-4=7(x-6) | | (x-2)*((x^2)+2*x+4)-x^2*(x-18)=0 | | 19x+14(x+525)=31770 | | 13=h+6 | | 2a^3+3b^3= | | 4x-5=17-x | | -45=5(2a/5)-3 | | 15x-19y=19 | | b(x)=5998x-7563 | | 9x-63=9x-63 | | 2x+7y+5x-2y-4x= | | 8x-17=10x+2 | | 3x-7(6-x)=9 | | 3x-70=-10x+21 | | 5x+3x=126 | | 113.47-16.82= | | q^2-14q+45=0 | | 40=-3x-5x-8 | | 3x+2y=65 | | 25x^2+150x+9y^2+18y+9=0 |

Equations solver categories