5x^2+11x=7

Simple and best practice solution for 5x^2+11x=7 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+11x=7 equation:


Simplifying
5x2 + 11x = 7

Reorder the terms:
11x + 5x2 = 7

Solving
11x + 5x2 = 7

Solving for variable 'x'.

Reorder the terms:
-7 + 11x + 5x2 = 7 + -7

Combine like terms: 7 + -7 = 0
-7 + 11x + 5x2 = 0

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

Divide each side by '5'.
-1.4 + 2.2x + x2 = 0

Move the constant term to the right:

Add '1.4' to each side of the equation.
-1.4 + 2.2x + 1.4 + x2 = 0 + 1.4

Reorder the terms:
-1.4 + 1.4 + 2.2x + x2 = 0 + 1.4

Combine like terms: -1.4 + 1.4 = 0.0
0.0 + 2.2x + x2 = 0 + 1.4
2.2x + x2 = 0 + 1.4

Combine like terms: 0 + 1.4 = 1.4
2.2x + x2 = 1.4

The x term is 2.2x.  Take half its coefficient (1.1).
Square it (1.21) and add it to both sides.

Add '1.21' to each side of the equation.
2.2x + 1.21 + x2 = 1.4 + 1.21

Reorder the terms:
1.21 + 2.2x + x2 = 1.4 + 1.21

Combine like terms: 1.4 + 1.21 = 2.61
1.21 + 2.2x + x2 = 2.61

Factor a perfect square on the left side:
(x + 1.1)(x + 1.1) = 2.61

Calculate the square root of the right side: 1.615549442

Break this problem into two subproblems by setting 
(x + 1.1) equal to 1.615549442 and -1.615549442.

Subproblem 1

x + 1.1 = 1.615549442 Simplifying x + 1.1 = 1.615549442 Reorder the terms: 1.1 + x = 1.615549442 Solving 1.1 + x = 1.615549442 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.1' to each side of the equation. 1.1 + -1.1 + x = 1.615549442 + -1.1 Combine like terms: 1.1 + -1.1 = 0.0 0.0 + x = 1.615549442 + -1.1 x = 1.615549442 + -1.1 Combine like terms: 1.615549442 + -1.1 = 0.515549442 x = 0.515549442 Simplifying x = 0.515549442

Subproblem 2

x + 1.1 = -1.615549442 Simplifying x + 1.1 = -1.615549442 Reorder the terms: 1.1 + x = -1.615549442 Solving 1.1 + x = -1.615549442 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.1' to each side of the equation. 1.1 + -1.1 + x = -1.615549442 + -1.1 Combine like terms: 1.1 + -1.1 = 0.0 0.0 + x = -1.615549442 + -1.1 x = -1.615549442 + -1.1 Combine like terms: -1.615549442 + -1.1 = -2.715549442 x = -2.715549442 Simplifying x = -2.715549442

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.515549442, -2.715549442}

See similar equations:

| 4x-60=0 | | -3e+12=5(e+52) | | 2y^3=10y | | 9ln(x+6)-4lnx= | | h=240t-16t^2 | | 7z=13z-12 | | 29x+43=43+27x | | (4x+5)(-2x+8)=0 | | 6x(y-z)= | | 1+2+4= | | 7(x-5)-2x=5(x-6)-5 | | 1=8x^2+7 | | 9p-14=p-47 | | lx-1l-2l=1 | | 14u^2+32u-u^3=0 | | 79(x-5)-2x=5(x-6)-5 | | 5(4x+6)=10(2x-5) | | 0=14u^2+32u-u^3 | | 3p+15=23 | | 1+n/11=9 | | y-5=-9(x-1) | | 6+6x=5x-9x-2 | | 5.2(k+4)=(-26) | | 9x^2-49x+68=x | | 9x^2-49x+68=0 | | 2x^2+10x=7x+9 | | 5y-3=4u+2 | | 9x^2-49x+60=0 | | 2m-4=2(6-7)m | | 26=-5x+6(2x-5) | | =0.5x+3 | | 2x-9+x+5=180 |

Equations solver categories