3x^2+11x+15=0

Simple and best practice solution for 3x^2+11x+15=0 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+11x+15=0 equation:


Simplifying
3x2 + 11x + 15 = 0

Reorder the terms:
15 + 11x + 3x2 = 0

Solving
15 + 11x + 3x2 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
5 + 3.666666667x + x2 = 0

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + 3.666666667x + -5 + x2 = 0 + -5

Reorder the terms:
5 + -5 + 3.666666667x + x2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 3.666666667x + x2 = 0 + -5
3.666666667x + x2 = 0 + -5

Combine like terms: 0 + -5 = -5
3.666666667x + x2 = -5

The x term is 3.666666667x.  Take half its coefficient (1.833333334).
Square it (3.361111114) and add it to both sides.

Add '3.361111114' to each side of the equation.
3.666666667x + 3.361111114 + x2 = -5 + 3.361111114

Reorder the terms:
3.361111114 + 3.666666667x + x2 = -5 + 3.361111114

Combine like terms: -5 + 3.361111114 = -1.638888886
3.361111114 + 3.666666667x + x2 = -1.638888886

Factor a perfect square on the left side:
(x + 1.833333334)(x + 1.833333334) = -1.638888886

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 2X+2(-4X+2)=-44 | | 4sin(2x-40)=1 | | 0=-4x^2+8x | | -x^2+x=-1 | | 3z+5=12z+14 | | 8x/6y | | U=15(6)+39 | | 3x-5+3x=139 | | 5X+2(-2X-18)=45 | | U=32+7+8n+7n | | 2x/7-18=-6 | | ln^3(x)=2 | | -2.25x+.75=-15 | | 4u=32 | | U=(8n+32)+7(n+1) | | 3y^2-8=0 | | 3.2=-8y+28.8 | | 9-3p=8+5(p-7) | | -n-2=-(1+3n) | | 2x+4=6x-11 | | Log1.6/log1.1 | | U=175+238 | | 17w+11=7 | | 34/3*7 | | 4w^2=18 | | U=22(3)+109 | | (2^1/7)p=-3 | | 2x+32+3x-12=90 | | solveY+-5=2(x+-4) | | 1/3x=26 | | 2.4x-1.3=-1.2x+2.3 | | 7/9-2/31/6 |

Equations solver categories