x^2+3x+x+10=90

Simple and best practice solution for x^2+3x+x+10=90 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 x^2+3x+x+10=90 equation:


Simplifying
x2 + 3x + x + 10 = 90

Reorder the terms:
10 + 3x + x + x2 = 90

Combine like terms: 3x + x = 4x
10 + 4x + x2 = 90

Solving
10 + 4x + x2 = 90

Solving for variable 'x'.

Reorder the terms:
10 + -90 + 4x + x2 = 90 + -90

Combine like terms: 10 + -90 = -80
-80 + 4x + x2 = 90 + -90

Combine like terms: 90 + -90 = 0
-80 + 4x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '80' to each side of the equation.
-80 + 4x + 80 + x2 = 0 + 80

Reorder the terms:
-80 + 80 + 4x + x2 = 0 + 80

Combine like terms: -80 + 80 = 0
0 + 4x + x2 = 0 + 80
4x + x2 = 0 + 80

Combine like terms: 0 + 80 = 80
4x + x2 = 80

The x term is 4x.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4x + 4 + x2 = 80 + 4

Reorder the terms:
4 + 4x + x2 = 80 + 4

Combine like terms: 80 + 4 = 84
4 + 4x + x2 = 84

Factor a perfect square on the left side:
(x + 2)(x + 2) = 84

Calculate the square root of the right side: 9.16515139

Break this problem into two subproblems by setting 
(x + 2) equal to 9.16515139 and -9.16515139.

Subproblem 1

x + 2 = 9.16515139 Simplifying x + 2 = 9.16515139 Reorder the terms: 2 + x = 9.16515139 Solving 2 + x = 9.16515139 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 9.16515139 + -2 Combine like terms: 2 + -2 = 0 0 + x = 9.16515139 + -2 x = 9.16515139 + -2 Combine like terms: 9.16515139 + -2 = 7.16515139 x = 7.16515139 Simplifying x = 7.16515139

Subproblem 2

x + 2 = -9.16515139 Simplifying x + 2 = -9.16515139 Reorder the terms: 2 + x = -9.16515139 Solving 2 + x = -9.16515139 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -9.16515139 + -2 Combine like terms: 2 + -2 = 0 0 + x = -9.16515139 + -2 x = -9.16515139 + -2 Combine like terms: -9.16515139 + -2 = -11.16515139 x = -11.16515139 Simplifying x = -11.16515139

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.16515139, -11.16515139}

See similar equations:

| 4-3d=d-8 | | 4(4-2y)+y=2 | | 4b-8=6b | | 5b+4b-3=33 | | 4+21nx=7 | | -8-3x-6y+y^2=0 | | 2(2c+9)=c | | (x+7)+(2x-7)+(6x)=180 | | 5x+24=59 | | 4-4*7-2= | | 15+18y-18y=-11 | | (x+5)+(x+5)(4x-4)=180 | | (X-.10x)-70=.35(70) | | y(2y-4)=1+2y | | (2x-1)(x-2)=5 | | (x+7)+(4x+3)+(5x)=180 | | y^2-6y-8=3x | | 7+6=a | | 3a+5x=12 | | 20x-7=5x+10 | | (x+-3)+(x+-3)+(3x+1)=180 | | (X-.15x)-85=.20(85) | | 4m(3m-5)-8=-11 | | 12t^2+8t-80=0 | | (x-3)+(x-3)+(3x+1)= | | 3x=x(2-4x) | | 5y-10=10y+5 | | 9.6-9y+6=2.4y-3.6+3y | | 3y-.5=1.4y+3.1 | | -10=y(6y-17)+2 | | 36x^2-39x-12=0 | | (4x-2)+(3x+6)= |

Equations solver categories