a^2+8a+2a=-5

Simple and best practice solution for a^2+8a+2a=-5 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 a^2+8a+2a=-5 equation:


Simplifying
a2 + 8a + 2a = -5

Reorder the terms:
8a + 2a + a2 = -5

Combine like terms: 8a + 2a = 10a
10a + a2 = -5

Solving
10a + a2 = -5

Solving for variable 'a'.

Reorder the terms:
5 + 10a + a2 = -5 + 5

Combine like terms: -5 + 5 = 0
5 + 10a + a2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + 10a + -5 + a2 = 0 + -5

Reorder the terms:
5 + -5 + 10a + a2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 10a + a2 = 0 + -5
10a + a2 = 0 + -5

Combine like terms: 0 + -5 = -5
10a + a2 = -5

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

Add '25' to each side of the equation.
10a + 25 + a2 = -5 + 25

Reorder the terms:
25 + 10a + a2 = -5 + 25

Combine like terms: -5 + 25 = 20
25 + 10a + a2 = 20

Factor a perfect square on the left side:
(a + 5)(a + 5) = 20

Calculate the square root of the right side: 4.472135955

Break this problem into two subproblems by setting 
(a + 5) equal to 4.472135955 and -4.472135955.

Subproblem 1

a + 5 = 4.472135955 Simplifying a + 5 = 4.472135955 Reorder the terms: 5 + a = 4.472135955 Solving 5 + a = 4.472135955 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + a = 4.472135955 + -5 Combine like terms: 5 + -5 = 0 0 + a = 4.472135955 + -5 a = 4.472135955 + -5 Combine like terms: 4.472135955 + -5 = -0.527864045 a = -0.527864045 Simplifying a = -0.527864045

Subproblem 2

a + 5 = -4.472135955 Simplifying a + 5 = -4.472135955 Reorder the terms: 5 + a = -4.472135955 Solving 5 + a = -4.472135955 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + a = -4.472135955 + -5 Combine like terms: 5 + -5 = 0 0 + a = -4.472135955 + -5 a = -4.472135955 + -5 Combine like terms: -4.472135955 + -5 = -9.472135955 a = -9.472135955 Simplifying a = -9.472135955

Solution

The solution to the problem is based on the solutions from the subproblems. a = {-0.527864045, -9.472135955}

See similar equations:

| 6(-x-12)=-18x+12 | | 16n=5 | | 20=1/4x^2 | | 150x^2+y^2=R^2 | | 6p=92 | | P=92 | | 4(-210+240x)=900x-780 | | 1/cos(5x) | | 4x-2[x+4]=x+1 | | x^2+4.33x+21=0 | | 17+4x+17(10x)=4x+1037 | | 2(8m+11)=4(4m-3)-8 | | lnt=3 | | -12.8y=0 | | -7/10-1/5x | | -14x+64(12+x)=-14X+1536 | | X^2+9y^2+2x-18y+1=0 | | 3*(4+6)-5=x | | 19(-8+5x)=760+19x | | 4x+(x-3)= | | 9(77x+110)=1089+594x | | 2x/5-4=24-18 | | 7+20x+4(12x)=439+20x | | 6(3z-1)-3(z+4)=2(z+1) | | x^2+(2p+10)x+p^2+55=0 | | x^3-13*x+12=0 | | m^3-29m^2n+120mn^2=0 | | x^3-13*x-16=0 | | x+(x*0.5)=2875 | | x^3-5*x+36=0 | | x^2y-9xy^2-36y^3=0 | | -t^2+6t-8=0 |

Equations solver categories