3-x(20x+12)=0

Simple and best practice solution for 3-x(20x+12)=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 3-x(20x+12)=0 equation:


Simplifying
3 + -1x(20x + 12) = 0

Reorder the terms:
3 + -1x(12 + 20x) = 0
3 + (12 * -1x + 20x * -1x) = 0
3 + (-12x + -20x2) = 0

Solving
3 + -12x + -20x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-20 the coefficient of the squared term: 

Divide each side by '-20'.
-0.15 + 0.6x + x2 = 0.0

Move the constant term to the right:

Add '0.15' to each side of the equation.
-0.15 + 0.6x + 0.15 + x2 = 0.0 + 0.15

Reorder the terms:
-0.15 + 0.15 + 0.6x + x2 = 0.0 + 0.15

Combine like terms: -0.15 + 0.15 = 0.00
0.00 + 0.6x + x2 = 0.0 + 0.15
0.6x + x2 = 0.0 + 0.15

Combine like terms: 0.0 + 0.15 = 0.15
0.6x + x2 = 0.15

The x term is 0.6x.  Take half its coefficient (0.3).
Square it (0.09) and add it to both sides.

Add '0.09' to each side of the equation.
0.6x + 0.09 + x2 = 0.15 + 0.09

Reorder the terms:
0.09 + 0.6x + x2 = 0.15 + 0.09

Combine like terms: 0.15 + 0.09 = 0.24
0.09 + 0.6x + x2 = 0.24

Factor a perfect square on the left side:
(x + 0.3)(x + 0.3) = 0.24

Calculate the square root of the right side: 0.489897949

Break this problem into two subproblems by setting 
(x + 0.3) equal to 0.489897949 and -0.489897949.

Subproblem 1

x + 0.3 = 0.489897949 Simplifying x + 0.3 = 0.489897949 Reorder the terms: 0.3 + x = 0.489897949 Solving 0.3 + x = 0.489897949 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3' to each side of the equation. 0.3 + -0.3 + x = 0.489897949 + -0.3 Combine like terms: 0.3 + -0.3 = 0.0 0.0 + x = 0.489897949 + -0.3 x = 0.489897949 + -0.3 Combine like terms: 0.489897949 + -0.3 = 0.189897949 x = 0.189897949 Simplifying x = 0.189897949

Subproblem 2

x + 0.3 = -0.489897949 Simplifying x + 0.3 = -0.489897949 Reorder the terms: 0.3 + x = -0.489897949 Solving 0.3 + x = -0.489897949 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3' to each side of the equation. 0.3 + -0.3 + x = -0.489897949 + -0.3 Combine like terms: 0.3 + -0.3 = 0.0 0.0 + x = -0.489897949 + -0.3 x = -0.489897949 + -0.3 Combine like terms: -0.489897949 + -0.3 = -0.789897949 x = -0.789897949 Simplifying x = -0.789897949

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.189897949, -0.789897949}

See similar equations:

| -3.7+2.4x=0 | | 2w-2=-9+3w | | 900=2X*55 | | -9d=1-8d | | 8=3(3x-0) | | -v-8=3v | | -2x=y+4 | | y+10-7y=-5(y-4) | | 5(2n+6)=-4(-5-2x)+3x | | G=2g-7 | | 3(-6-7v)= | | 12(b+3)=4(3b+3)+3b | | -2n=-3+10 | | 5-3x+4x=-5 | | (-9x^6y^4z)(y^2z^4)= | | 18=-9r | | 2t-0=15 | | 2(1x-3)=2x | | 6y+x=12 | | 36=-12b | | 4a-4=2a+34 | | 8n+(4n+5)=27 | | 0=11.0+-4.1(t) | | x+5-2=20 | | 3-4x=13-x+2x | | -47=a+34 | | 2=x-8/4 | | 15w^3+12w^2+35w+28= | | 3(2x-3)=4x(x+4) | | 3p+7p=-16+8p | | -10p+8=-9p | | -9x+10y=-9 |

Equations solver categories