5x^2+3x-2x^2+7-8=25

Simple and best practice solution for 5x^2+3x-2x^2+7-8=25 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 5x^2+3x-2x^2+7-8=25 equation:


Simplifying
5x2 + 3x + -2x2 + 7 + -8 = 25

Reorder the terms:
7 + -8 + 3x + 5x2 + -2x2 = 25

Combine like terms: 7 + -8 = -1
-1 + 3x + 5x2 + -2x2 = 25

Combine like terms: 5x2 + -2x2 = 3x2
-1 + 3x + 3x2 = 25

Solving
-1 + 3x + 3x2 = 25

Solving for variable 'x'.

Reorder the terms:
-1 + -25 + 3x + 3x2 = 25 + -25

Combine like terms: -1 + -25 = -26
-26 + 3x + 3x2 = 25 + -25

Combine like terms: 25 + -25 = 0
-26 + 3x + 3x2 = 0

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

Divide each side by '3'.
-8.666666667 + x + x2 = 0

Move the constant term to the right:

Add '8.666666667' to each side of the equation.
-8.666666667 + x + 8.666666667 + x2 = 0 + 8.666666667

Reorder the terms:
-8.666666667 + 8.666666667 + x + x2 = 0 + 8.666666667

Combine like terms: -8.666666667 + 8.666666667 = 0.000000000
0.000000000 + x + x2 = 0 + 8.666666667
x + x2 = 0 + 8.666666667

Combine like terms: 0 + 8.666666667 = 8.666666667
x + x2 = 8.666666667

The x term is x.  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.
 + 0.25 + x2 = 8.666666667 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = 8.666666667 + 0.25

Combine like terms: 8.666666667 + 0.25 = 8.916666667
1.25 + x2 = 8.916666667

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 8.916666667

Calculate the square root of the right side: 2.986078811

Break this problem into two subproblems by setting 
(x + 0.5) equal to 2.986078811 and -2.986078811.

Subproblem 1

x + 0.5 = 2.986078811 Simplifying x + 0.5 = 2.986078811 Reorder the terms: 0.5 + x = 2.986078811 Solving 0.5 + x = 2.986078811 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 = 2.986078811 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 2.986078811 + -0.5 x = 2.986078811 + -0.5 Combine like terms: 2.986078811 + -0.5 = 2.486078811 x = 2.486078811 Simplifying x = 2.486078811

Subproblem 2

x + 0.5 = -2.986078811 Simplifying x + 0.5 = -2.986078811 Reorder the terms: 0.5 + x = -2.986078811 Solving 0.5 + x = -2.986078811 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 = -2.986078811 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -2.986078811 + -0.5 x = -2.986078811 + -0.5 Combine like terms: -2.986078811 + -0.5 = -3.486078811 x = -3.486078811 Simplifying x = -3.486078811

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.486078811, -3.486078811}

See similar equations:

| 3(2)+5y=-4 | | 12=w+3w | | y=-8/15x-29/15 | | 5n^2-7=-67 | | g(x)=8x^2+16x-42 | | 5/9n−2=2/3n | | X+3x+2x+2x+2x+8x-5= | | 2k^2+7=105 | | 5x^2+3x-2x^2+7-8= | | h=-16t+20+4 | | 25-1/2x=1/4x-5 | | 108=5y+13 | | -52p^2+80p^3-60p=0 | | 27.75=2a+3c | | 500-20x=80+10x | | 4(3x+7)=12x+K | | 42=uk | | 5-3x=3x-5 | | 7t-7=1+9t | | 10x^2+37x-21=0 | | 6(x-5)+x=-86 | | n^2-n-10=10 | | 2(x-3)=-6x+2 | | 5p-9=-8+4p | | 12+m=-6 | | 3(2)-4z=22 | | 230-1.5x=180-0.5x | | x^2+x-16384=0 | | -1.1x+1.3(x+1.3)=19.88 | | 3(2)+5y=z | | Z+3y=x | | 4(6x-1)=5(5x+3) |

Equations solver categories