4x^2+5x=-12

Simple and best practice solution for 4x^2+5x=-12 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 4x^2+5x=-12 equation:


Simplifying
4x2 + 5x = -12

Reorder the terms:
5x + 4x2 = -12

Solving
5x + 4x2 = -12

Solving for variable 'x'.

Reorder the terms:
12 + 5x + 4x2 = -12 + 12

Combine like terms: -12 + 12 = 0
12 + 5x + 4x2 = 0

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

Divide each side by '4'.
3 + 1.25x + x2 = 0

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + 1.25x + -3 + x2 = 0 + -3

Reorder the terms:
3 + -3 + 1.25x + x2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 1.25x + x2 = 0 + -3
1.25x + x2 = 0 + -3

Combine like terms: 0 + -3 = -3
1.25x + x2 = -3

The x term is 1.25x.  Take half its coefficient (0.625).
Square it (0.390625) and add it to both sides.

Add '0.390625' to each side of the equation.
1.25x + 0.390625 + x2 = -3 + 0.390625

Reorder the terms:
0.390625 + 1.25x + x2 = -3 + 0.390625

Combine like terms: -3 + 0.390625 = -2.609375
0.390625 + 1.25x + x2 = -2.609375

Factor a perfect square on the left side:
(x + 0.625)(x + 0.625) = -2.609375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 12(m+20)=16m | | x(2)+5x-14=0 | | 8w-30=5w-40 | | 4x^2=-12x-6 | | (x/4)=(x/5)+(7/4) | | 2y-1/21=3y-7/15 | | 10+x+60=90 | | 10=2(2x-1) | | -0.08y+0.10(800-y)=0.07y | | 3x/x+2-x/x-2+8/x^2-4 | | 3x=x+10+2 | | 1/2x-3=-2 | | 4+10m-5+2m=1 | | 3x/x+2-x/x-2+8/x2-4 | | 3/5x-1=5 | | n(2)=-8n-7 | | 2/7x+8=0 | | 2n^2+6n=108 | | -7x-6=-6 | | 3(x-3)+6=-4+x-23 | | 15-1/5x=5 | | 2(2x+2)=12 | | -6x-6=-6 | | 8-1/4x=-4 | | -8y+18=5y-6 | | x(2)-48=-2x | | x-17=-11 | | 2c-3d=6 | | 1/2(10y) | | B^2-6b=-8 | | 4-2=x/-4 | | 2(3x-5)-1=4x+5 |

Equations solver categories