5x^2-9=10x

Simple and best practice solution for 5x^2-9=10x 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 5x^2-9=10x equation:


Simplifying
5x2 + -9 = 10x

Reorder the terms:
-9 + 5x2 = 10x

Solving
-9 + 5x2 = 10x

Solving for variable 'x'.

Reorder the terms:
-9 + -10x + 5x2 = 10x + -10x

Combine like terms: 10x + -10x = 0
-9 + -10x + 5x2 = 0

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

Divide each side by '5'.
-1.8 + -2x + x2 = 0

Move the constant term to the right:

Add '1.8' to each side of the equation.
-1.8 + -2x + 1.8 + x2 = 0 + 1.8

Reorder the terms:
-1.8 + 1.8 + -2x + x2 = 0 + 1.8

Combine like terms: -1.8 + 1.8 = 0.0
0.0 + -2x + x2 = 0 + 1.8
-2x + x2 = 0 + 1.8

Combine like terms: 0 + 1.8 = 1.8
-2x + x2 = 1.8

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 1.8 + 1

Reorder the terms:
1 + -2x + x2 = 1.8 + 1

Combine like terms: 1.8 + 1 = 2.8
1 + -2x + x2 = 2.8

Factor a perfect square on the left side:
(x + -1)(x + -1) = 2.8

Calculate the square root of the right side: 1.673320053

Break this problem into two subproblems by setting 
(x + -1) equal to 1.673320053 and -1.673320053.

Subproblem 1

x + -1 = 1.673320053 Simplifying x + -1 = 1.673320053 Reorder the terms: -1 + x = 1.673320053 Solving -1 + x = 1.673320053 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 1.673320053 + 1 Combine like terms: -1 + 1 = 0 0 + x = 1.673320053 + 1 x = 1.673320053 + 1 Combine like terms: 1.673320053 + 1 = 2.673320053 x = 2.673320053 Simplifying x = 2.673320053

Subproblem 2

x + -1 = -1.673320053 Simplifying x + -1 = -1.673320053 Reorder the terms: -1 + x = -1.673320053 Solving -1 + x = -1.673320053 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -1.673320053 + 1 Combine like terms: -1 + 1 = 0 0 + x = -1.673320053 + 1 x = -1.673320053 + 1 Combine like terms: -1.673320053 + 1 = -0.673320053 x = -0.673320053 Simplifying x = -0.673320053

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.673320053, -0.673320053}

See similar equations:

| 3(-14)+7y=70 | | x^5+5x^4-2x^3-10x^2+5=0 | | 3(3+2x)-4=41 | | .75m+14=1.87m-10.3936 | | (3x+17)=(5x-7) | | 2(2x+2)=3x+7 | | 3(21)+7y=70 | | r+4/3=7 | | -6(4x+1)+7x+9(x-3)=15 | | 5+5x=6+3x | | 3(7)+7y=70 | | -3z+z= | | F-4=6f+24 | | 8+(3x)-2= | | 2(x-3)-x+8=8.5 | | -17-2r=3(r+1) | | 38=2(2x+-5+1x) | | -30-5y=100 | | 8x-4=6x+24 | | y=-9x+7 | | -3=15x+4 | | -20-5y=100 | | 15z+z= | | 2+5x+x=-10 | | 15+z= | | 3(x+3)=5x+15 | | nahom=cl | | -1+(-34)=x | | 2p^2-4p=24 | | 5(x-2)=y-10 | | 5x+2x-8=34 | | 4n+5=8n-5 |

Equations solver categories