x*x+2x=10

Simple and best practice solution for x*x+2x=10 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*x+2x=10 equation:


Simplifying
x * x + 2x = 10

Multiply x * x
x2 + 2x = 10

Reorder the terms:
2x + x2 = 10

Solving
2x + x2 = 10

Solving for variable 'x'.

Reorder the terms:
-10 + 2x + x2 = 10 + -10

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

Begin completing the square.

Move the constant term to the right:

Add '10' to each side of the equation.
-10 + 2x + 10 + x2 = 0 + 10

Reorder the terms:
-10 + 10 + 2x + x2 = 0 + 10

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

Combine like terms: 0 + 10 = 10
2x + x2 = 10

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 10 + 1

Reorder the terms:
1 + 2x + x2 = 10 + 1

Combine like terms: 10 + 1 = 11
1 + 2x + x2 = 11

Factor a perfect square on the left side:
(x + 1)(x + 1) = 11

Calculate the square root of the right side: 3.31662479

Break this problem into two subproblems by setting 
(x + 1) equal to 3.31662479 and -3.31662479.

Subproblem 1

x + 1 = 3.31662479 Simplifying x + 1 = 3.31662479 Reorder the terms: 1 + x = 3.31662479 Solving 1 + x = 3.31662479 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 3.31662479 + -1 Combine like terms: 1 + -1 = 0 0 + x = 3.31662479 + -1 x = 3.31662479 + -1 Combine like terms: 3.31662479 + -1 = 2.31662479 x = 2.31662479 Simplifying x = 2.31662479

Subproblem 2

x + 1 = -3.31662479 Simplifying x + 1 = -3.31662479 Reorder the terms: 1 + x = -3.31662479 Solving 1 + x = -3.31662479 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -3.31662479 + -1 Combine like terms: 1 + -1 = 0 0 + x = -3.31662479 + -1 x = -3.31662479 + -1 Combine like terms: -3.31662479 + -1 = -4.31662479 x = -4.31662479 Simplifying x = -4.31662479

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.31662479, -4.31662479}

See similar equations:

| 10x-12+4x=6x+20 | | 6(4-2x)=4(5-6x) | | 6n-7=-11 | | 7(x-3)=2(x-8) | | 7x+3=-130 | | -[b+4]+1=10 | | 8(m-3)=6+2m | | x*x+2x=2 | | 9(9g+2)=166.5 | | 12w+2=4 | | 17y=8x | | 14x+15x-8+5=-7x+5-8 | | 8x+y+14x+7y= | | 3x+35=130 | | 4x^2-1x-3=0 | | P-1=5pm+3p-8 | | 18v=270 | | 3x-63=90 | | =ln(0.5x) | | [x-2]+4=3 | | 3(8+5s)-6s=2 | | -2(n-10)-6n+9= | | 14x+17x-6+2=-7x+2-6 | | 5(w-2)-8w=2 | | f(5)=-x-7 | | 9-5n-6+6n= | | 9(11+9)=10(X+100) | | -6(n-2)+3(n+1)= | | 2m-8=128 | | 180-(2x-15)+30=x | | 7a+3=5a+9 | | 7x-16=40+5x |

Equations solver categories