x*x+5x+3=0

Simple and best practice solution for x*x+5x+3=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 x*x+5x+3=0 equation:


Simplifying
x * x + 5x + 3 = 0

Multiply x * x
x2 + 5x + 3 = 0

Reorder the terms:
3 + 5x + x2 = 0

Solving
3 + 5x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + 5x + -3 + x2 = 0 + -3

Reorder the terms:
3 + -3 + 5x + x2 = 0 + -3

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

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

The x term is 5x.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x + 6.25 + x2 = -3 + 6.25

Reorder the terms:
6.25 + 5x + x2 = -3 + 6.25

Combine like terms: -3 + 6.25 = 3.25
6.25 + 5x + x2 = 3.25

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 3.25

Calculate the square root of the right side: 1.802775638

Break this problem into two subproblems by setting 
(x + 2.5) equal to 1.802775638 and -1.802775638.

Subproblem 1

x + 2.5 = 1.802775638 Simplifying x + 2.5 = 1.802775638 Reorder the terms: 2.5 + x = 1.802775638 Solving 2.5 + x = 1.802775638 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = 1.802775638 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 1.802775638 + -2.5 x = 1.802775638 + -2.5 Combine like terms: 1.802775638 + -2.5 = -0.697224362 x = -0.697224362 Simplifying x = -0.697224362

Subproblem 2

x + 2.5 = -1.802775638 Simplifying x + 2.5 = -1.802775638 Reorder the terms: 2.5 + x = -1.802775638 Solving 2.5 + x = -1.802775638 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = -1.802775638 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -1.802775638 + -2.5 x = -1.802775638 + -2.5 Combine like terms: -1.802775638 + -2.5 = -4.302775638 x = -4.302775638 Simplifying x = -4.302775638

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.697224362, -4.302775638}

See similar equations:

| x+70+80=210 | | 18273+21.25x=62881+11x | | .90x=55+.40x | | 48/2(9*3) | | m^2-25n^2=0 | | y=(1/3)x-7 | | 2(x-6)+3(x+1)=4x+3 | | (m*m)-(25n*25n)=0 | | 2*x=1 | | (x-3/2x+5)+4x+3 | | (x*x)-6x-27=0 | | 1.2(6x-8)=2.4(x-5) | | y^2-11+19=-5 | | 4x+3/x-3/2x+5 | | a+b-c+d=b+c+d | | 5x-x=15+x | | 3x+4x=10+2x | | 4x+3*x-3/2x+5 | | -5X*3=x+9 | | x-5*3=x+9 | | (x*x)-3x-40=0 | | 2.8x=x+1 | | 6x+32=x*2-8 | | (m*m)-25n*25n=0 | | 4(9-15y+6.25y^2)+16y^2=20(3-2.5y)+4y-19 | | (x*x)+3x-40=0 | | 36-60y+25y^2+16y^2-60+50y-4y+19=0 | | 6x+32=2x-8 | | 41y^2-14y-5=0 | | (4*-2)+13-6=0 | | (x*x)-33x=0 | | (38+x+50)/3=50 |

Equations solver categories