2x^2-3x-4-7x+9-x^2=

Simple and best practice solution for 2x^2-3x-4-7x+9-x^2= 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 2x^2-3x-4-7x+9-x^2= equation:


Simplifying
2x2 + -3x + -4 + -7x + 9 + -1x2 = 0

Reorder the terms:
-4 + 9 + -3x + -7x + 2x2 + -1x2 = 0

Combine like terms: -4 + 9 = 5
5 + -3x + -7x + 2x2 + -1x2 = 0

Combine like terms: -3x + -7x = -10x
5 + -10x + 2x2 + -1x2 = 0

Combine like terms: 2x2 + -1x2 = 1x2
5 + -10x + 1x2 = 0

Solving
5 + -10x + 1x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + -10x + -5 + x2 = 0 + -5

Reorder the terms:
5 + -5 + -10x + x2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -10x + x2 = 0 + -5
-10x + x2 = 0 + -5

Combine like terms: 0 + -5 = -5
-10x + x2 = -5

The x term is -10x.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10x + 25 + x2 = -5 + 25

Reorder the terms:
25 + -10x + x2 = -5 + 25

Combine like terms: -5 + 25 = 20
25 + -10x + x2 = 20

Factor a perfect square on the left side:
(x + -5)(x + -5) = 20

Calculate the square root of the right side: 4.472135955

Break this problem into two subproblems by setting 
(x + -5) equal to 4.472135955 and -4.472135955.

Subproblem 1

x + -5 = 4.472135955 Simplifying x + -5 = 4.472135955 Reorder the terms: -5 + x = 4.472135955 Solving -5 + x = 4.472135955 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = 4.472135955 + 5 Combine like terms: -5 + 5 = 0 0 + x = 4.472135955 + 5 x = 4.472135955 + 5 Combine like terms: 4.472135955 + 5 = 9.472135955 x = 9.472135955 Simplifying x = 9.472135955

Subproblem 2

x + -5 = -4.472135955 Simplifying x + -5 = -4.472135955 Reorder the terms: -5 + x = -4.472135955 Solving -5 + x = -4.472135955 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = -4.472135955 + 5 Combine like terms: -5 + 5 = 0 0 + x = -4.472135955 + 5 x = -4.472135955 + 5 Combine like terms: -4.472135955 + 5 = 0.527864045 x = 0.527864045 Simplifying x = 0.527864045

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.472135955, 0.527864045}

See similar equations:

| -2(x-9)-22=-4 | | 2.25*t=15 | | 3r-7=-2r+23 | | 4-A+2-A=-11+A-1 | | -3(4-k)+8k=3-(-7k-5) | | 4-2x-34y+17xy=0 | | x^2+xy-56y^2= | | 500-3x=296 | | 5+3x=7[x+3] | | W/6-6.32=4.8 | | 9xy+7yz-5xz-9xy= | | 6s^2+31s+35=0 | | 0.2x+12=21 | | 85=log(x) | | v^2+13vy+30y^2= | | 4(1/(e^x))Sin(x)=0 | | -5a+b=10 | | 8y^2-5y+16-11y^2-5y+1= | | P=bw+5 | | 5a+6b=25 | | -2(x+8)=16 | | 1.8sin(x)=6cos(x)+5 | | 3g-14=-32 | | m^2+24+10m=0 | | 11y-55=77 | | -5-7=9x+4-8x | | X/20=6 | | m^2+24+10=0 | | 2x+2x-8=5 | | 12z+4=2(5z+81)-12 | | -2x+2(-1/3x+9)=-6 | | 9x-7y=21 |

Equations solver categories