-x+4x(x+3)=-12

Simple and best practice solution for -x+4x(x+3)=-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 -x+4x(x+3)=-12 equation:


Simplifying
-1x + 4x(x + 3) = -12

Reorder the terms:
-1x + 4x(3 + x) = -12
-1x + (3 * 4x + x * 4x) = -12
-1x + (12x + 4x2) = -12

Combine like terms: -1x + 12x = 11x
11x + 4x2 = -12

Solving
11x + 4x2 = -12

Solving for variable 'x'.

Reorder the terms:
12 + 11x + 4x2 = -12 + 12

Combine like terms: -12 + 12 = 0
12 + 11x + 4x2 = 0

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

Divide each side by '4'.
3 + 2.75x + x2 = 0

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + 2.75x + -3 + x2 = 0 + -3

Reorder the terms:
3 + -3 + 2.75x + x2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 2.75x + x2 = 0 + -3
2.75x + x2 = 0 + -3

Combine like terms: 0 + -3 = -3
2.75x + x2 = -3

The x term is 2.75x.  Take half its coefficient (1.375).
Square it (1.890625) and add it to both sides.

Add '1.890625' to each side of the equation.
2.75x + 1.890625 + x2 = -3 + 1.890625

Reorder the terms:
1.890625 + 2.75x + x2 = -3 + 1.890625

Combine like terms: -3 + 1.890625 = -1.109375
1.890625 + 2.75x + x2 = -1.109375

Factor a perfect square on the left side:
(x + 1.375)(x + 1.375) = -1.109375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| -5-(6-5p)= | | 3=z+15 | | 0.5(2-x)=1.5+8 | | 16p^2=64 | | 0.8+50=-12 | | -188=-5x+7(5x+16) | | 8.95-1.50r=26.95 | | 100[0.03(y+6)]= | | 7+-1=8 | | r^2+6=7r | | 3(7k-8)=81 | | x+(x+3)+(2x-5)=38 | | 6x+9=-2x+1 | | 8.95-1.50=26.95 | | x^2+2x=4x^2+2x | | -5.5(4y+6)-2.4(3y-5)= | | -124=-2x+2(-3x-18) | | (-7m^6n^7)(3mn^2)= | | -3(x)=x-(6-2(x)) | | -124=-2x+(-3x-18) | | 8=8b-4(b+8) | | y=2x^2+8x+13 | | 3(x)+7=-x-1 | | 18-3.8x=7.36-1.09x | | 10-2y=-8 | | ln(9)+ln(3x^2+1)=4 | | f(-4)=3x^2-8 | | -3x+4(5x-14)=151 | | (2i-6)+(8i-14)=90 | | 180-x=10+2[90-x] | | 2+3p=14+5p | | 4x+20=x^2-1 |

Equations solver categories