3x^2+5x=-6

Simple and best practice solution for 3x^2+5x=-6 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 3x^2+5x=-6 equation:


Simplifying
3x2 + 5x = -6

Reorder the terms:
5x + 3x2 = -6

Solving
5x + 3x2 = -6

Solving for variable 'x'.

Reorder the terms:
6 + 5x + 3x2 = -6 + 6

Combine like terms: -6 + 6 = 0
6 + 5x + 3x2 = 0

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

Divide each side by '3'.
2 + 1.666666667x + x2 = 0

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + 1.666666667x + -2 + x2 = 0 + -2

Reorder the terms:
2 + -2 + 1.666666667x + x2 = 0 + -2

Combine like terms: 2 + -2 = 0
0 + 1.666666667x + x2 = 0 + -2
1.666666667x + x2 = 0 + -2

Combine like terms: 0 + -2 = -2
1.666666667x + x2 = -2

The x term is 1.666666667x.  Take half its coefficient (0.8333333335).
Square it (0.6944444447) and add it to both sides.

Add '0.6944444447' to each side of the equation.
1.666666667x + 0.6944444447 + x2 = -2 + 0.6944444447

Reorder the terms:
0.6944444447 + 1.666666667x + x2 = -2 + 0.6944444447

Combine like terms: -2 + 0.6944444447 = -1.3055555553
0.6944444447 + 1.666666667x + x2 = -1.3055555553

Factor a perfect square on the left side:
(x + 0.8333333335)(x + 0.8333333335) = -1.3055555553

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 2x+9y=-36 | | -x+8=0 | | 158-7x=20x+17 | | 12x=4x(3x-1) | | 2(x+4)=8x | | -6x-7=0 | | x+2[x+4]=23 | | 4.9*(t^2)-10.5*t-63=0 | | 11-10x=45-17x | | 7a^4-35a^3-14a^2= | | 8x+4=56 | | 3y-4x=27 | | -4x+3y=2y | | 2(X+5)=13+X | | 20x=140 | | 4.9*(t^2)-12*t-55=0 | | 3[95-6x]=x-152 | | 39x^2+21x=0 | | 8a^3+4a^2+12a= | | 2(X+5)=3(2X-1) | | -8-8x=12-4x | | -3(7+5x)+3(2x-2)= | | 7*24= | | .5*x*7*24=660 | | 2(x+6)=3(x-6) | | -4x+4=(2x+3) | | 2(5c-1)-5=5c+3 | | 2x-4x+13=27 | | -2x^2y+2xy+12y= | | 0.8(x-4)=20.0 | | 58-18=5(x-1) | | y=x^2+10x+9 |

Equations solver categories