2x^2+11x-16=

Simple and best practice solution for 2x^2+11x-16= 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+11x-16= equation:


Simplifying
2x2 + 11x + -16 = 0

Reorder the terms:
-16 + 11x + 2x2 = 0

Solving
-16 + 11x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
-8 + 5.5x + x2 = 0

Move the constant term to the right:

Add '8' to each side of the equation.
-8 + 5.5x + 8 + x2 = 0 + 8

Reorder the terms:
-8 + 8 + 5.5x + x2 = 0 + 8

Combine like terms: -8 + 8 = 0
0 + 5.5x + x2 = 0 + 8
5.5x + x2 = 0 + 8

Combine like terms: 0 + 8 = 8
5.5x + x2 = 8

The x term is 5.5x.  Take half its coefficient (2.75).
Square it (7.5625) and add it to both sides.

Add '7.5625' to each side of the equation.
5.5x + 7.5625 + x2 = 8 + 7.5625

Reorder the terms:
7.5625 + 5.5x + x2 = 8 + 7.5625

Combine like terms: 8 + 7.5625 = 15.5625
7.5625 + 5.5x + x2 = 15.5625

Factor a perfect square on the left side:
(x + 2.75)(x + 2.75) = 15.5625

Calculate the square root of the right side: 3.94493346

Break this problem into two subproblems by setting 
(x + 2.75) equal to 3.94493346 and -3.94493346.

Subproblem 1

x + 2.75 = 3.94493346 Simplifying x + 2.75 = 3.94493346 Reorder the terms: 2.75 + x = 3.94493346 Solving 2.75 + x = 3.94493346 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.75' to each side of the equation. 2.75 + -2.75 + x = 3.94493346 + -2.75 Combine like terms: 2.75 + -2.75 = 0.00 0.00 + x = 3.94493346 + -2.75 x = 3.94493346 + -2.75 Combine like terms: 3.94493346 + -2.75 = 1.19493346 x = 1.19493346 Simplifying x = 1.19493346

Subproblem 2

x + 2.75 = -3.94493346 Simplifying x + 2.75 = -3.94493346 Reorder the terms: 2.75 + x = -3.94493346 Solving 2.75 + x = -3.94493346 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.75' to each side of the equation. 2.75 + -2.75 + x = -3.94493346 + -2.75 Combine like terms: 2.75 + -2.75 = 0.00 0.00 + x = -3.94493346 + -2.75 x = -3.94493346 + -2.75 Combine like terms: -3.94493346 + -2.75 = -6.69493346 x = -6.69493346 Simplifying x = -6.69493346

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.19493346, -6.69493346}

See similar equations:

| log[5](4x^2)-3log[5](2x)=12-log[5](12x^2) | | 5(l-4)=3(l+2) | | 7=5k-5+7k | | 105=5x+x | | Y-3=3(x+8) | | -23=5v+2 | | -2n+4n=16 | | -6x-4y=-12 | | x*2+8=8*x-5 | | 3x+5y+7z=53 | | 5t=17+2(4+-6) | | -8x-3=-5x-18 | | 6x+14=-22 | | X^4+2x^2-16x^2-32=0 | | -4x+13=29 | | 7x+12=2x+17 | | 6x+9=x+8 | | 7x-14+3x=42+8x | | 9+4x(7-2)= | | 5x+5=2x+8 | | x-9=2x-5 | | 2(5x+7)-(3x-2)=0 | | -6x-17=-3x-2 | | 38=14-8a | | 2x+x^2=24y-120-y^2 | | 3(n-7)-(8-n)= | | -2x+21=15 | | x+3=-5x+27 | | m^2+17m+30=0 | | 9x+16=5x-12 | | 19=6p+1 | | y=(x^2-6*x^2+9*x) |

Equations solver categories