4x^2+15x+18=0

Simple and best practice solution for 4x^2+15x+18=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 4x^2+15x+18=0 equation:


Simplifying
4x2 + 15x + 18 = 0

Reorder the terms:
18 + 15x + 4x2 = 0

Solving
18 + 15x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
4.5 + 3.75x + x2 = 0

Move the constant term to the right:

Add '-4.5' to each side of the equation.
4.5 + 3.75x + -4.5 + x2 = 0 + -4.5

Reorder the terms:
4.5 + -4.5 + 3.75x + x2 = 0 + -4.5

Combine like terms: 4.5 + -4.5 = 0.0
0.0 + 3.75x + x2 = 0 + -4.5
3.75x + x2 = 0 + -4.5

Combine like terms: 0 + -4.5 = -4.5
3.75x + x2 = -4.5

The x term is 3.75x.  Take half its coefficient (1.875).
Square it (3.515625) and add it to both sides.

Add '3.515625' to each side of the equation.
3.75x + 3.515625 + x2 = -4.5 + 3.515625

Reorder the terms:
3.515625 + 3.75x + x2 = -4.5 + 3.515625

Combine like terms: -4.5 + 3.515625 = -0.984375
3.515625 + 3.75x + x2 = -0.984375

Factor a perfect square on the left side:
(x + 1.875)(x + 1.875) = -0.984375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| w^3x^2y^4-w^6x^3y^2=0 | | -30=3x-12 | | 10.4=b-2.4 | | 5.6=2.1+x | | 3.1x=6.2 | | 18m^2-14n^3=0 | | 8=-18x | | y/-4=11 | | 1/3v+1/v=1 | | 2/5+a=6 | | (5-x)/(x-4) | | -1/3b=-3 | | -45a^4+36a^2=0 | | 42x-4y=3 | | 2x+10y=33 | | 49a^4-14a^2=0 | | 19-3x=82 | | x^4+2x^3-23x^2+12x+336=0 | | (p+3)(4p+1)= | | x^2+12x+35=-3x-1 | | 5/6-x=1/6 | | -40a^6b^6+25a^2b^5=0 | | 5/7+x=40/7 | | 4a^2-2a+3=0 | | (9/x-1)(7/x-3) | | 4x-8-2x=x-6 | | m/2+1=-2.78 | | 8x^2-3x+2=0 | | ((8x^8)/y)^-3 | | (2-5x)(2-5x)=0 | | 10x+3=-5(x+7)+8 | | x-2/5=61/4 |

Equations solver categories