3=.5x^2-4x+9

Simple and best practice solution for 3=.5x^2-4x+9 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=.5x^2-4x+9 equation:


Simplifying
3 = 0.5x2 + -4x + 9

Reorder the terms:
3 = 9 + -4x + 0.5x2

Solving
3 = 9 + -4x + 0.5x2

Solving for variable 'x'.

Combine like terms: 3 + -9 = -6
-6 + 4x + -0.5x2 = 9 + -4x + 0.5x2 + -9 + 4x + -0.5x2

Reorder the terms:
-6 + 4x + -0.5x2 = 9 + -9 + -4x + 4x + 0.5x2 + -0.5x2

Combine like terms: 9 + -9 = 0
-6 + 4x + -0.5x2 = 0 + -4x + 4x + 0.5x2 + -0.5x2
-6 + 4x + -0.5x2 = -4x + 4x + 0.5x2 + -0.5x2

Combine like terms: -4x + 4x = 0
-6 + 4x + -0.5x2 = 0 + 0.5x2 + -0.5x2
-6 + 4x + -0.5x2 = 0.5x2 + -0.5x2

Combine like terms: 0.5x2 + -0.5x2 = 0.0
-6 + 4x + -0.5x2 = 0.0

Begin completing the square.  Divide all terms by
-0.5 the coefficient of the squared term: 

Divide each side by '-0.5'.
12 + -8x + x2 = 0

Move the constant term to the right:

Add '-12' to each side of the equation.
12 + -8x + -12 + x2 = 0 + -12

Reorder the terms:
12 + -12 + -8x + x2 = 0 + -12

Combine like terms: 12 + -12 = 0
0 + -8x + x2 = 0 + -12
-8x + x2 = 0 + -12

Combine like terms: 0 + -12 = -12
-8x + x2 = -12

The x term is -8x.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8x + 16 + x2 = -12 + 16

Reorder the terms:
16 + -8x + x2 = -12 + 16

Combine like terms: -12 + 16 = 4
16 + -8x + x2 = 4

Factor a perfect square on the left side:
(x + -4)(x + -4) = 4

Calculate the square root of the right side: 2

Break this problem into two subproblems by setting 
(x + -4) equal to 2 and -2.

Subproblem 1

x + -4 = 2 Simplifying x + -4 = 2 Reorder the terms: -4 + x = 2 Solving -4 + x = 2 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 2 + 4 Combine like terms: -4 + 4 = 0 0 + x = 2 + 4 x = 2 + 4 Combine like terms: 2 + 4 = 6 x = 6 Simplifying x = 6

Subproblem 2

x + -4 = -2 Simplifying x + -4 = -2 Reorder the terms: -4 + x = -2 Solving -4 + x = -2 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -2 + 4 Combine like terms: -4 + 4 = 0 0 + x = -2 + 4 x = -2 + 4 Combine like terms: -2 + 4 = 2 x = 2 Simplifying x = 2

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6, 2}

See similar equations:

| 7(x-2)+4=32 | | (x^2)+6x=23 | | 5(2-4x)=-20+x | | -4X+2=-34 | | -x-15=4x-20 | | 4x+18=38-3x | | y=(3m-1)(2m+3)(2m+1) | | 3(-3x-4)=5x-26 | | 3x-4=3x+37 | | 3(3x-10)=2(6x+24) | | 4x+8=-38-3x | | 11x-67=2(x+43) | | 3p+4p=26 | | (x^2)+8x=10 | | 5x-43=41+x | | 13.58=2g+3.94 | | 1/3=1/9y. | | 2x-37=28-3x | | (x^2)+10x=37 | | y=-16t^2+80t+144 | | 5x+5t+4c+(3c+5g)= | | 35=5/2x-15 | | 3(5x-26)=3x-4 | | f(x)=3x^2+12x-3 | | 12x+9-5x=-12 | | -2/7*(-1/5) | | 2(2x+1)=3(x+4) | | f(x)=3x^2-12x-3 | | 5e^13x=16 | | 6(x+2)=2(x+6) | | 2(4x+6)+2x=3(2x+8) | | 5/6x-1/3=4/3 |

Equations solver categories