l^2+10l-168=0

Simple and best practice solution for l^2+10l-168=0 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 l^2+10l-168=0 equation:


Simplifying
l2 + 10l + -168 = 0

Reorder the terms:
-168 + 10l + l2 = 0

Solving
-168 + 10l + l2 = 0

Solving for variable 'l'.

Begin completing the square.

Move the constant term to the right:

Add '168' to each side of the equation.
-168 + 10l + 168 + l2 = 0 + 168

Reorder the terms:
-168 + 168 + 10l + l2 = 0 + 168

Combine like terms: -168 + 168 = 0
0 + 10l + l2 = 0 + 168
10l + l2 = 0 + 168

Combine like terms: 0 + 168 = 168
10l + l2 = 168

The l term is 10l.  Take half its coefficient (5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
10l + 25 + l2 = 168 + 25

Reorder the terms:
25 + 10l + l2 = 168 + 25

Combine like terms: 168 + 25 = 193
25 + 10l + l2 = 193

Factor a perfect square on the left side:
(l + 5)(l + 5) = 193

Calculate the square root of the right side: 13.892443989

Break this problem into two subproblems by setting 
(l + 5) equal to 13.892443989 and -13.892443989.

Subproblem 1

l + 5 = 13.892443989 Simplifying l + 5 = 13.892443989 Reorder the terms: 5 + l = 13.892443989 Solving 5 + l = 13.892443989 Solving for variable 'l'. Move all terms containing l to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + l = 13.892443989 + -5 Combine like terms: 5 + -5 = 0 0 + l = 13.892443989 + -5 l = 13.892443989 + -5 Combine like terms: 13.892443989 + -5 = 8.892443989 l = 8.892443989 Simplifying l = 8.892443989

Subproblem 2

l + 5 = -13.892443989 Simplifying l + 5 = -13.892443989 Reorder the terms: 5 + l = -13.892443989 Solving 5 + l = -13.892443989 Solving for variable 'l'. Move all terms containing l to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + l = -13.892443989 + -5 Combine like terms: 5 + -5 = 0 0 + l = -13.892443989 + -5 l = -13.892443989 + -5 Combine like terms: -13.892443989 + -5 = -18.892443989 l = -18.892443989 Simplifying l = -18.892443989

Solution

The solution to the problem is based on the solutions from the subproblems. l = {8.892443989, -18.892443989}

See similar equations:

| 3z/7-1=-5 | | sin^2(x)+sin(x)-1=0 | | 32-15x(-32)= | | 21590-6x=21872 | | X^3+x=32 | | -6n+14=-5n-11 | | 0.01+2=3.1 | | (2x-7)x=15 | | Y=(p-4)x-(3p-10) | | 16y^2-x^2+2x+64y+63=0 | | 0.5x-0.6=0.3x-0.8 | | 6x+2=66-2x | | -2x+13=x-2 | | Z^4=1+j | | (sin)(x)*(cos)(x)=0.1 | | (.0324x)(.20)=.07 | | cos(x)*sin(x)=0.1 | | 336=3x+y+w | | x-32x=74 | | P+148=k | | x-32=74 | | 10x-20=6x+10 | | x+32=74 | | -u=at-v | | 5x+30=15+2x | | 15x+12.6y+4.7z=2 | | -0.6=2(1.5+0.4m)-0.2m | | .75x+.5-x=.5(x-.75) | | (5-r)(5+r)=0 | | -16=6(2+3m)-4m | | 6x-2(-3x/4-25/4)=-10 | | 6x-2?(-3x/4-25/4)=-10 |

Equations solver categories