0=-0.5*x^2+2.5*x+4.5

Simple and best practice solution for 0=-0.5*x^2+2.5*x+4.5 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 0=-0.5*x^2+2.5*x+4.5 equation:


Simplifying
0 = -0.5x2 + 2.5x + 4.5

Reorder the terms:
0 = 4.5 + 2.5x + -0.5x2

Solving
0 = 4.5 + 2.5x + -0.5x2

Solving for variable 'x'.

Combine like terms: 0 + -4.5 = -4.5
-4.5 + -2.5x + 0.5x2 = 4.5 + 2.5x + -0.5x2 + -4.5 + -2.5x + 0.5x2

Reorder the terms:
-4.5 + -2.5x + 0.5x2 = 4.5 + -4.5 + 2.5x + -2.5x + -0.5x2 + 0.5x2

Combine like terms: 4.5 + -4.5 = 0.0
-4.5 + -2.5x + 0.5x2 = 0.0 + 2.5x + -2.5x + -0.5x2 + 0.5x2
-4.5 + -2.5x + 0.5x2 = 2.5x + -2.5x + -0.5x2 + 0.5x2

Combine like terms: 2.5x + -2.5x = 0.0
-4.5 + -2.5x + 0.5x2 = 0.0 + -0.5x2 + 0.5x2
-4.5 + -2.5x + 0.5x2 = -0.5x2 + 0.5x2

Combine like terms: -0.5x2 + 0.5x2 = 0.0
-4.5 + -2.5x + 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'.
-9 + -5x + x2 = 0

Move the constant term to the right:

Add '9' to each side of the equation.
-9 + -5x + 9 + x2 = 0 + 9

Reorder the terms:
-9 + 9 + -5x + x2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + -5x + x2 = 0 + 9
-5x + x2 = 0 + 9

Combine like terms: 0 + 9 = 9
-5x + x2 = 9

The x term is -5x.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5x + 6.25 + x2 = 9 + 6.25

Reorder the terms:
6.25 + -5x + x2 = 9 + 6.25

Combine like terms: 9 + 6.25 = 15.25
6.25 + -5x + x2 = 15.25

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = 15.25

Calculate the square root of the right side: 3.905124838

Break this problem into two subproblems by setting 
(x + -2.5) equal to 3.905124838 and -3.905124838.

Subproblem 1

x + -2.5 = 3.905124838 Simplifying x + -2.5 = 3.905124838 Reorder the terms: -2.5 + x = 3.905124838 Solving -2.5 + x = 3.905124838 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = 3.905124838 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 3.905124838 + 2.5 x = 3.905124838 + 2.5 Combine like terms: 3.905124838 + 2.5 = 6.405124838 x = 6.405124838 Simplifying x = 6.405124838

Subproblem 2

x + -2.5 = -3.905124838 Simplifying x + -2.5 = -3.905124838 Reorder the terms: -2.5 + x = -3.905124838 Solving -2.5 + x = -3.905124838 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = -3.905124838 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -3.905124838 + 2.5 x = -3.905124838 + 2.5 Combine like terms: -3.905124838 + 2.5 = -1.405124838 x = -1.405124838 Simplifying x = -1.405124838

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.405124838, -1.405124838}

See similar equations:

| .2x-.03=.97 | | -7=9+D | | 2X^2+14-36= | | 8x+23=-7 | | 4(7-7x^2)=7 | | 8x+23=-21 | | 1.9-7.1= | | 2(x-4)=6+2x | | 12y-10y-12=20.66 | | 5(2w-1)-2(3w+2)=4w-9 | | M=29 | | 18x^2-43x+5=0 | | 14-3x(9-6)= | | 9-4(2p)-1=45 | | 0.40x+0.20(120)=0.20(146) | | 14x+7=5x-2 | | 33y^12+15y^5= | | 14000=-15000(x)+36000 | | 72a^4+72a^2-432a^2= | | 9y-6-4y+2=0 | | 8h+6h=16h-1 | | 2b+3=47 | | 12+6y=9+-3y | | 72a^4+72a^2= | | 8h+7h-16h=8 | | log(36x)=78 | | 8h+6h(16)=8 | | -6a+10=-4a+-16 | | V=(30-2x)(40-2x)(x) | | 9m+17=134 | | 8+6-16=h | | 4(3z+6)=6-3(z-6) |

Equations solver categories