4u^2+9u=-12

Simple and best practice solution for 4u^2+9u=-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 4u^2+9u=-12 equation:


Simplifying
4u2 + 9u = -12

Reorder the terms:
9u + 4u2 = -12

Solving
9u + 4u2 = -12

Solving for variable 'u'.

Reorder the terms:
12 + 9u + 4u2 = -12 + 12

Combine like terms: -12 + 12 = 0
12 + 9u + 4u2 = 0

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

Divide each side by '4'.
3 + 2.25u + u2 = 0

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + 2.25u + -3 + u2 = 0 + -3

Reorder the terms:
3 + -3 + 2.25u + u2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 2.25u + u2 = 0 + -3
2.25u + u2 = 0 + -3

Combine like terms: 0 + -3 = -3
2.25u + u2 = -3

The u term is 2.25u.  Take half its coefficient (1.125).
Square it (1.265625) and add it to both sides.

Add '1.265625' to each side of the equation.
2.25u + 1.265625 + u2 = -3 + 1.265625

Reorder the terms:
1.265625 + 2.25u + u2 = -3 + 1.265625

Combine like terms: -3 + 1.265625 = -1.734375
1.265625 + 2.25u + u2 = -1.734375

Factor a perfect square on the left side:
(u + 1.125)(u + 1.125) = -1.734375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 7(x+4)-(4x-3)= | | 4n-26=(2-n) | | 2n^2=3+2n | | 25-x=2x+25 | | -6x^4(5-x^2)= | | 3n-35=-2(6n+4) | | (x^2)-(3+i)x+(2+6i)=0 | | 5x^5+60x^4+180c^3= | | 2r^2-5r+4=5 | | 7+4(k-3)+6k= | | 7+20=5+30p | | 10d-2=7d+4 | | 3(4-v)=-30+4v | | 6(z+5)=-10 | | X+4.3=-4.3 | | 7+20=5+30 | | -28=-(1-8p)-3(p-1) | | K^3-27k-6k^2=0 | | 25-3x-5=2x+16+x | | m^2+5m-13=-4 | | 4-26=5(2-n) | | a+(2a-4)=8 | | 5x-2(x+1)=.25 | | -5x-9y=3 | | 3/8c=-12 | | 200+6=500-6m | | 6.4u-5.1u=-3.25 | | x-3(2x-5)+2x-1=14 | | -60=5t | | 9000000/300000 | | -8x^3(x-5)= | | 4*x+8= |

Equations solver categories