5(x^2+8x)=14

Simple and best practice solution for 5(x^2+8x)=14 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 5(x^2+8x)=14 equation:


Simplifying
5(x2 + 8x) = 14

Reorder the terms:
5(8x + x2) = 14
(8x * 5 + x2 * 5) = 14
(40x + 5x2) = 14

Solving
40x + 5x2 = 14

Solving for variable 'x'.

Reorder the terms:
-14 + 40x + 5x2 = 14 + -14

Combine like terms: 14 + -14 = 0
-14 + 40x + 5x2 = 0

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

Divide each side by '5'.
-2.8 + 8x + x2 = 0

Move the constant term to the right:

Add '2.8' to each side of the equation.
-2.8 + 8x + 2.8 + x2 = 0 + 2.8

Reorder the terms:
-2.8 + 2.8 + 8x + x2 = 0 + 2.8

Combine like terms: -2.8 + 2.8 = 0.0
0.0 + 8x + x2 = 0 + 2.8
8x + x2 = 0 + 2.8

Combine like terms: 0 + 2.8 = 2.8
8x + x2 = 2.8

The x term is 8x.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8x + 16 + x2 = 2.8 + 16

Reorder the terms:
16 + 8x + x2 = 2.8 + 16

Combine like terms: 2.8 + 16 = 18.8
16 + 8x + x2 = 18.8

Factor a perfect square on the left side:
(x + 4)(x + 4) = 18.8

Calculate the square root of the right side: 4.335896678

Break this problem into two subproblems by setting 
(x + 4) equal to 4.335896678 and -4.335896678.

Subproblem 1

x + 4 = 4.335896678 Simplifying x + 4 = 4.335896678 Reorder the terms: 4 + x = 4.335896678 Solving 4 + x = 4.335896678 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = 4.335896678 + -4 Combine like terms: 4 + -4 = 0 0 + x = 4.335896678 + -4 x = 4.335896678 + -4 Combine like terms: 4.335896678 + -4 = 0.335896678 x = 0.335896678 Simplifying x = 0.335896678

Subproblem 2

x + 4 = -4.335896678 Simplifying x + 4 = -4.335896678 Reorder the terms: 4 + x = -4.335896678 Solving 4 + x = -4.335896678 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = -4.335896678 + -4 Combine like terms: 4 + -4 = 0 0 + x = -4.335896678 + -4 x = -4.335896678 + -4 Combine like terms: -4.335896678 + -4 = -8.335896678 x = -8.335896678 Simplifying x = -8.335896678

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.335896678, -8.335896678}

See similar equations:

| 30-10a=7a-4 | | 12x^3-37x^2+29x-6=0 | | 2w+4w+12=86 | | 4x+9=2x+69 | | 30n^7/6n^5 | | 15+y=3 | | 6lnx+4lny-3lnz=0 | | 6x-44=180 | | 6(x+9)=-66 | | (2x+3)+(3x-4)=180 | | m+533=804 | | -5/8/-7/2 | | 9+6=11 | | 125x^3-216v^3= | | Y-3=3/4(x-24) | | Y-(-6)=0.3(x-0) | | -2x+6=-3x+3 | | 5x+15=515 | | 6x+3y-18=0 | | 30f=-150 | | (4x+9)2=6 | | 5w-6+4w=21 | | 18z+4=-54 | | 18-4(-x)=35 | | 9z-7z-z+3=19 | | 7y=6x-1 | | 4w^2-12wp+9p^2= | | 11b+12=-5 | | 17x-14x-2x=11 | | 5x+x=12+2x | | 7d+3=61 | | x/2-16 |

Equations solver categories