2x^2+5x=6

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


Simplifying
2x2 + 5x = 6

Reorder the terms:
5x + 2x2 = 6

Solving
5x + 2x2 = 6

Solving for variable 'x'.

Reorder the terms:
-6 + 5x + 2x2 = 6 + -6

Combine like terms: 6 + -6 = 0
-6 + 5x + 2x2 = 0

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

Divide each side by '2'.
-3 + 2.5x + x2 = 0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + 2.5x + 3 + x2 = 0 + 3

Reorder the terms:
-3 + 3 + 2.5x + x2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + 2.5x + x2 = 0 + 3
2.5x + x2 = 0 + 3

Combine like terms: 0 + 3 = 3
2.5x + x2 = 3

The x term is 2.5x.  Take half its coefficient (1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
2.5x + 1.5625 + x2 = 3 + 1.5625

Reorder the terms:
1.5625 + 2.5x + x2 = 3 + 1.5625

Combine like terms: 3 + 1.5625 = 4.5625
1.5625 + 2.5x + x2 = 4.5625

Factor a perfect square on the left side:
(x + 1.25)(x + 1.25) = 4.5625

Calculate the square root of the right side: 2.136000936

Break this problem into two subproblems by setting 
(x + 1.25) equal to 2.136000936 and -2.136000936.

Subproblem 1

x + 1.25 = 2.136000936 Simplifying x + 1.25 = 2.136000936 Reorder the terms: 1.25 + x = 2.136000936 Solving 1.25 + x = 2.136000936 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + x = 2.136000936 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + x = 2.136000936 + -1.25 x = 2.136000936 + -1.25 Combine like terms: 2.136000936 + -1.25 = 0.886000936 x = 0.886000936 Simplifying x = 0.886000936

Subproblem 2

x + 1.25 = -2.136000936 Simplifying x + 1.25 = -2.136000936 Reorder the terms: 1.25 + x = -2.136000936 Solving 1.25 + x = -2.136000936 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + x = -2.136000936 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + x = -2.136000936 + -1.25 x = -2.136000936 + -1.25 Combine like terms: -2.136000936 + -1.25 = -3.386000936 x = -3.386000936 Simplifying x = -3.386000936

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.886000936, -3.386000936}

See similar equations:

| 3x-5-7x=15 | | 1/3(t+5)=44 | | 2/y-4=7 | | 15=20t+-5t^2 | | 3x-5-7=15 | | 7n+3-1=-5 | | 7+3=x | | 4(-x-3)+6=6x+14 | | 79=4x+3 | | 5sqrtx^4*x^5*x^6= | | 12=17t-5t^2 | | 2x^2+y=42 | | -3/4-3x | | 4m+2n-m-n= | | 2(6x+4)+6=4(2x-4)-14 | | 15n-3=10.35 | | -21=5x-16 | | 5x-12=-7 | | i(x)=8-3x | | 6-7x=18-7x-20 | | 2(x+9)-3=27 | | (3/9)-(5x/9)=(2/9)-(8x/9) | | 1470+7(m-30)=4300 | | 2y^2-x^2-49=0 | | 1470+7(m-30)=2150 | | x/5-3=x+3(-5) | | 4(6x+8)=4(2x+10) | | y=1/5rt | | -12=6x+18 | | 19=51v | | 19=v | | 0=x^2+12x-54 |

Equations solver categories