a^2+4a=-5

Simple and best practice solution for a^2+4a=-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+4a=-5 equation:


Simplifying
a2 + 4a = -5

Reorder the terms:
4a + a2 = -5

Solving
4a + a2 = -5

Solving for variable 'a'.

Reorder the terms:
5 + 4a + a2 = -5 + 5

Combine like terms: -5 + 5 = 0
5 + 4a + a2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + 4a + -5 + a2 = 0 + -5

Reorder the terms:
5 + -5 + 4a + a2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 4a + a2 = 0 + -5
4a + a2 = 0 + -5

Combine like terms: 0 + -5 = -5
4a + a2 = -5

The a term is 4a.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4a + 4 + a2 = -5 + 4

Reorder the terms:
4 + 4a + a2 = -5 + 4

Combine like terms: -5 + 4 = -1
4 + 4a + a2 = -1

Factor a perfect square on the left side:
(a + 2)(a + 2) = -1

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 0.04(y-4)+0.2y=0.14y-0.9 | | 4t+r=s | | 9p^2=49 | | -20x^2-x+5=0 | | 15=-3(2x+2)+7x | | 3x^4-9x^4-30x^2= | | 0.2x+0.35(30)=23.5 | | 2y6z/5y6y | | -2a+8=2a | | 2(4k+5)-12k+4+3= | | -4a+8=2a | | (2x-3)/3+2=(2-3x)/5 | | 3416.32=b(17) | | 35/15x43/11 | | 25-4,3/4 | | 6+3w=-9 | | -4x^2+16x=21 | | 2*((x+3)/12x) | | 2x-3/3+2=2-3x/5 | | 2*(u+3)/12u | | 5/9x7/4 | | 40-74d-92-3d+1+8d= | | 7x+3y=28 | | 47.1=3.14(r)(6) | | 2y+6+3x=180 | | y+5=-4 | | x/4+9=-4 | | 5x-x+8= | | 2x^(1/2)-11x^(1/4)-6=0 | | (3a^5b^5)/6a^4b^-2 | | x-x^2=1.5 | | 7x+5=3-(9x-3) |

Equations solver categories