3x^2-4x^2-12x+16=0

Simple and best practice solution for 3x^2-4x^2-12x+16=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 3x^2-4x^2-12x+16=0 equation:


Simplifying
3x2 + -4x2 + -12x + 16 = 0

Reorder the terms:
16 + -12x + 3x2 + -4x2 = 0

Combine like terms: 3x2 + -4x2 = -1x2
16 + -12x + -1x2 = 0

Solving
16 + -12x + -1x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-16 + 12x + x2 = 0

Move the constant term to the right:

Add '16' to each side of the equation.
-16 + 12x + 16 + x2 = 0 + 16

Reorder the terms:
-16 + 16 + 12x + x2 = 0 + 16

Combine like terms: -16 + 16 = 0
0 + 12x + x2 = 0 + 16
12x + x2 = 0 + 16

Combine like terms: 0 + 16 = 16
12x + x2 = 16

The x term is 12x.  Take half its coefficient (6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
12x + 36 + x2 = 16 + 36

Reorder the terms:
36 + 12x + x2 = 16 + 36

Combine like terms: 16 + 36 = 52
36 + 12x + x2 = 52

Factor a perfect square on the left side:
(x + 6)(x + 6) = 52

Calculate the square root of the right side: 7.211102551

Break this problem into two subproblems by setting 
(x + 6) equal to 7.211102551 and -7.211102551.

Subproblem 1

x + 6 = 7.211102551 Simplifying x + 6 = 7.211102551 Reorder the terms: 6 + x = 7.211102551 Solving 6 + x = 7.211102551 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = 7.211102551 + -6 Combine like terms: 6 + -6 = 0 0 + x = 7.211102551 + -6 x = 7.211102551 + -6 Combine like terms: 7.211102551 + -6 = 1.211102551 x = 1.211102551 Simplifying x = 1.211102551

Subproblem 2

x + 6 = -7.211102551 Simplifying x + 6 = -7.211102551 Reorder the terms: 6 + x = -7.211102551 Solving 6 + x = -7.211102551 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = -7.211102551 + -6 Combine like terms: 6 + -6 = 0 0 + x = -7.211102551 + -6 x = -7.211102551 + -6 Combine like terms: -7.211102551 + -6 = -13.211102551 x = -13.211102551 Simplifying x = -13.211102551

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.211102551, -13.211102551}

See similar equations:

| x^3-5x^2+4x+10=y | | 3x-2(8-x)=19 | | -8x^2-22x-5=0 | | 6=k*50 | | 13/2= | | (13x-5)=(12x+4) | | x-0.65=182 | | (3x^3-4x^2)(-12x+16)=0 | | 3sin^3x=sinx*cos^2x | | X+6y+z=20 | | 7i+8i+7+6+9i=-32 | | 6-7i/6-7i | | 4x^2+3x^2=yx^2 | | 7x-23+4x+3=123 | | 7e+5-4e-3=-20 | | log(x/10^-4)=6.6 | | 2x^2+7x=42-x | | 3y-42=25 | | 8-4(1/8r-31/2 | | 7/99=56 | | 4-(2x)=10+x | | 3x^2+112=2x^2+22x | | -6+14=7x+32-3x | | -3/4x-1/2=2+1/4x | | 7e+5-4e-3=20 | | -5x+2y+5z=46 | | X^2+61=1-17x | | c+25=6 | | -5x-4x-9=81 | | 2/5w=1/3(w-9) | | 4-2x=10x | | 5w^2-50=0 |

Equations solver categories