X^2+6X-2=9

Simple and best practice solution for X^2+6X-2=9 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+6X-2=9 equation:


Simplifying
X2 + 6X + -2 = 9

Reorder the terms:
-2 + 6X + X2 = 9

Solving
-2 + 6X + X2 = 9

Solving for variable 'X'.

Reorder the terms:
-2 + -9 + 6X + X2 = 9 + -9

Combine like terms: -2 + -9 = -11
-11 + 6X + X2 = 9 + -9

Combine like terms: 9 + -9 = 0
-11 + 6X + X2 = 0

Begin completing the square.

Move the constant term to the right:

Add '11' to each side of the equation.
-11 + 6X + 11 + X2 = 0 + 11

Reorder the terms:
-11 + 11 + 6X + X2 = 0 + 11

Combine like terms: -11 + 11 = 0
0 + 6X + X2 = 0 + 11
6X + X2 = 0 + 11

Combine like terms: 0 + 11 = 11
6X + X2 = 11

The X term is 6X.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6X + 9 + X2 = 11 + 9

Reorder the terms:
9 + 6X + X2 = 11 + 9

Combine like terms: 11 + 9 = 20
9 + 6X + X2 = 20

Factor a perfect square on the left side:
(X + 3)(X + 3) = 20

Calculate the square root of the right side: 4.472135955

Break this problem into two subproblems by setting 
(X + 3) equal to 4.472135955 and -4.472135955.

Subproblem 1

X + 3 = 4.472135955 Simplifying X + 3 = 4.472135955 Reorder the terms: 3 + X = 4.472135955 Solving 3 + X = 4.472135955 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + X = 4.472135955 + -3 Combine like terms: 3 + -3 = 0 0 + X = 4.472135955 + -3 X = 4.472135955 + -3 Combine like terms: 4.472135955 + -3 = 1.472135955 X = 1.472135955 Simplifying X = 1.472135955

Subproblem 2

X + 3 = -4.472135955 Simplifying X + 3 = -4.472135955 Reorder the terms: 3 + X = -4.472135955 Solving 3 + X = -4.472135955 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + X = -4.472135955 + -3 Combine like terms: 3 + -3 = 0 0 + X = -4.472135955 + -3 X = -4.472135955 + -3 Combine like terms: -4.472135955 + -3 = -7.472135955 X = -7.472135955 Simplifying X = -7.472135955

Solution

The solution to the problem is based on the solutions from the subproblems. X = {1.472135955, -7.472135955}

See similar equations:

| 0.571428= | | -176=-8(1-3p) | | L^2+0.04L-0.000321=0 | | X^3-4x^2+x+26=f(x) | | h(t)=-16t^2+70t+90 | | 4(1+6n)=172 | | 7(1-7a)=-19 | | (5x)=35+90 | | 3(x+4)=3(x+1)+9 | | -222=6(5p+3) | | 1/6x-9=1/3(3x-24) | | 3x+5=-(x+17) | | x^3+3x^2+3x-3=0 | | 2.5x+0.1x-0.02x= | | 2x^3+3x^2-11x-6=f(x) | | -155=8x-3 | | (y-8)=m(x-5) | | -155=8x-8 | | 132=6-2(1-8x) | | .5x-1=x+.25 | | 124/96 | | -14=-(1+m) | | 8/9/3/32 | | 99=9(2+x) | | 14x^3-111x^2-5x-36=0 | | 5(2x-4)=-2(x+3) | | y-4=-2(0) | | 12=-6(r+5) | | -7w+29=-2(w-7) | | 1/9x6x3/8 | | 5=v/3=5 | | 4x+2x=2x-63 |

Equations solver categories