4=0.5(-x^2+x+12)

Simple and best practice solution for 4=0.5(-x^2+x+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 4=0.5(-x^2+x+12) equation:


Simplifying
4 = 0.5(-1x2 + x + 12)

Reorder the terms:
4 = 0.5(12 + x + -1x2)
4 = (12 * 0.5 + x * 0.5 + -1x2 * 0.5)
4 = (6 + 0.5x + -0.5x2)

Solving
4 = 6 + 0.5x + -0.5x2

Solving for variable 'x'.

Combine like terms: 4 + -6 = -2
-2 + -0.5x + 0.5x2 = 6 + 0.5x + -0.5x2 + -6 + -0.5x + 0.5x2

Reorder the terms:
-2 + -0.5x + 0.5x2 = 6 + -6 + 0.5x + -0.5x + -0.5x2 + 0.5x2

Combine like terms: 6 + -6 = 0
-2 + -0.5x + 0.5x2 = 0 + 0.5x + -0.5x + -0.5x2 + 0.5x2
-2 + -0.5x + 0.5x2 = 0.5x + -0.5x + -0.5x2 + 0.5x2

Combine like terms: 0.5x + -0.5x = 0.0
-2 + -0.5x + 0.5x2 = 0.0 + -0.5x2 + 0.5x2
-2 + -0.5x + 0.5x2 = -0.5x2 + 0.5x2

Combine like terms: -0.5x2 + 0.5x2 = 0.0
-2 + -0.5x + 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'.
-4 + -1x + x2 = 0

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + -1x + 4 + x2 = 0 + 4

Reorder the terms:
-4 + 4 + -1x + x2 = 0 + 4

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

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

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = 4 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 4 + 0.25

Combine like terms: 4 + 0.25 = 4.25
0.25 + -1x + x2 = 4.25

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 4.25

Calculate the square root of the right side: 2.061552813

Break this problem into two subproblems by setting 
(x + -0.5) equal to 2.061552813 and -2.061552813.

Subproblem 1

x + -0.5 = 2.061552813 Simplifying x + -0.5 = 2.061552813 Reorder the terms: -0.5 + x = 2.061552813 Solving -0.5 + x = 2.061552813 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 2.061552813 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 2.061552813 + 0.5 x = 2.061552813 + 0.5 Combine like terms: 2.061552813 + 0.5 = 2.561552813 x = 2.561552813 Simplifying x = 2.561552813

Subproblem 2

x + -0.5 = -2.061552813 Simplifying x + -0.5 = -2.061552813 Reorder the terms: -0.5 + x = -2.061552813 Solving -0.5 + x = -2.061552813 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = -2.061552813 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -2.061552813 + 0.5 x = -2.061552813 + 0.5 Combine like terms: -2.061552813 + 0.5 = -1.561552813 x = -1.561552813 Simplifying x = -1.561552813

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.561552813, -1.561552813}

See similar equations:

| -3(3v+15)-(10+x)=35 | | 5x-15-2x-2= | | 3.7=5.7-0.4x | | 28*x-42=154 | | 5x+2x-5=16 | | 5x+2x-5=176 | | x+75y=200 | | -9=162 | | 14=1.65-.0056t+0.001683t^2 | | -5m+8=2m+29 | | 7p+.20=5p+.30 | | 2(7x+4)=-6(2-x)+7 | | 18x-5-6x=0 | | 14=7.02+1.65t-0.0028t^2+0.0005561t^3 | | 4.5+10m=8.34 | | i+-12=79 | | 4.2+10m=8.34 | | 47x+10=17 | | e^1-14x=5 | | -4(t+5)=-2(2t+10) | | X=-6y+3 | | 1-2x+8x=13 | | 7y-1=5-5y | | 6(x-5)=2x+2 | | 0.6x-0.3=23 | | 24+14x=12x-19 | | 4+2y=5 | | f(x)=-x^3+4x^2-7 | | (x-3)(x+5)=7x-15 | | 9-(x/4)=65 | | 3(2x+10)=47 | | y+2y-5=19 |

Equations solver categories