5x^2=6x+9

Simple and best practice solution for 5x^2=6x+9 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=6x+9 equation:


Simplifying
5x2 = 6x + 9

Reorder the terms:
5x2 = 9 + 6x

Solving
5x2 = 9 + 6x

Solving for variable 'x'.

Reorder the terms:
-9 + -6x + 5x2 = 9 + 6x + -9 + -6x

Reorder the terms:
-9 + -6x + 5x2 = 9 + -9 + 6x + -6x

Combine like terms: 9 + -9 = 0
-9 + -6x + 5x2 = 0 + 6x + -6x
-9 + -6x + 5x2 = 6x + -6x

Combine like terms: 6x + -6x = 0
-9 + -6x + 5x2 = 0

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

Divide each side by '5'.
-1.8 + -1.2x + x2 = 0

Move the constant term to the right:

Add '1.8' to each side of the equation.
-1.8 + -1.2x + 1.8 + x2 = 0 + 1.8

Reorder the terms:
-1.8 + 1.8 + -1.2x + x2 = 0 + 1.8

Combine like terms: -1.8 + 1.8 = 0.0
0.0 + -1.2x + x2 = 0 + 1.8
-1.2x + x2 = 0 + 1.8

Combine like terms: 0 + 1.8 = 1.8
-1.2x + x2 = 1.8

The x term is -1.2x.  Take half its coefficient (-0.6).
Square it (0.36) and add it to both sides.

Add '0.36' to each side of the equation.
-1.2x + 0.36 + x2 = 1.8 + 0.36

Reorder the terms:
0.36 + -1.2x + x2 = 1.8 + 0.36

Combine like terms: 1.8 + 0.36 = 2.16
0.36 + -1.2x + x2 = 2.16

Factor a perfect square on the left side:
(x + -0.6)(x + -0.6) = 2.16

Calculate the square root of the right side: 1.469693846

Break this problem into two subproblems by setting 
(x + -0.6) equal to 1.469693846 and -1.469693846.

Subproblem 1

x + -0.6 = 1.469693846 Simplifying x + -0.6 = 1.469693846 Reorder the terms: -0.6 + x = 1.469693846 Solving -0.6 + x = 1.469693846 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.6' to each side of the equation. -0.6 + 0.6 + x = 1.469693846 + 0.6 Combine like terms: -0.6 + 0.6 = 0.0 0.0 + x = 1.469693846 + 0.6 x = 1.469693846 + 0.6 Combine like terms: 1.469693846 + 0.6 = 2.069693846 x = 2.069693846 Simplifying x = 2.069693846

Subproblem 2

x + -0.6 = -1.469693846 Simplifying x + -0.6 = -1.469693846 Reorder the terms: -0.6 + x = -1.469693846 Solving -0.6 + x = -1.469693846 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.6' to each side of the equation. -0.6 + 0.6 + x = -1.469693846 + 0.6 Combine like terms: -0.6 + 0.6 = 0.0 0.0 + x = -1.469693846 + 0.6 x = -1.469693846 + 0.6 Combine like terms: -1.469693846 + 0.6 = -0.869693846 x = -0.869693846 Simplifying x = -0.869693846

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.069693846, -0.869693846}

See similar equations:

| (98.6-32)/1.8= | | (-2x)/3+1=5/9 | | 3(x+3)=2x+7 | | 7x+4=7x+3 | | c-17=35 | | 37-9x=17+11x | | x^2+2x=.19 | | 28=b-13 | | 8(h-1)=6n+42h | | a+19=42 | | 6-9x=5x-10x+10 | | 5x+15+2=24+4x | | (4x+7)(6x-7)=0 | | 46x+3x-60=5x-10-4x | | 4p+5q+2p+3q= | | 4n+5n+7=43 | | x^2-18x+96=0 | | 2b+24=-4+18 | | 5(x+4)+10=7x | | 2x(7x+4)=4x-6(2-x)+7 | | (6x+7)(3x-7)=0 | | 2b+24=-6+18 | | 40+.20x=60+.10x | | n=-14+1n | | 5a+3b+2a+6b= | | 2y^3-4y+1=0 | | 4m+5=2m+25 | | 10h-2h-5h= | | 5x+1(3-15)=13x-1(1-5) | | ex=w | | 113-7x=29x+21 | | 8-2m=-3m |

Equations solver categories