(x+2)(x-4)=2

Simple and best practice solution for (x+2)(x-4)=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 (x+2)(x-4)=2 equation:


Simplifying
(x + 2)(x + -4) = 2

Reorder the terms:
(2 + x)(x + -4) = 2

Reorder the terms:
(2 + x)(-4 + x) = 2

Multiply (2 + x) * (-4 + x)
(2(-4 + x) + x(-4 + x)) = 2
((-4 * 2 + x * 2) + x(-4 + x)) = 2
((-8 + 2x) + x(-4 + x)) = 2
(-8 + 2x + (-4 * x + x * x)) = 2
(-8 + 2x + (-4x + x2)) = 2

Combine like terms: 2x + -4x = -2x
(-8 + -2x + x2) = 2

Solving
-8 + -2x + x2 = 2

Solving for variable 'x'.

Reorder the terms:
-8 + -2 + -2x + x2 = 2 + -2

Combine like terms: -8 + -2 = -10
-10 + -2x + x2 = 2 + -2

Combine like terms: 2 + -2 = 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 = 4.31662479 x = 4.31662479 Simplifying x = 4.31662479

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 = -2.31662479 x = -2.31662479 Simplifying x = -2.31662479

Solution

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

See similar equations:

| 99+x=180 | | x-.15=4623 | | 1+24=5(6x-5) | | y=12.00x+50 | | (3x+11)=(4x-21) | | 5x^2+16x+9=0 | | d=-5t^2+60 | | ln(13x+4)=-1.3 | | 15b^2+22b-6=-14 | | 15b^2+22= | | x^2-2x+31=0 | | (3x-43)=80 | | (m+3)(5m+1)=3(m-4)+7 | | x+x+1+x+1=195 | | -2+4(9-9m)= | | -144r^2+1=0 | | 2x+28= | | (5x^2-11x+9)+(7x-13-3x^2)= | | 4(3x+8)=-21+5 | | x+x+1+x+2=195 | | x=x/2 | | .04x+.07(6000.00-x)=360.00 | | x^2+y^2+8x+2y=0 | | f(x)=-3x^2+9x+9 | | 2/3n+4/5n=2/3 | | x+.4(3)=.90(x+4) | | -8(3r^2-9r)+3(7r^2+7r)= | | 3x+1.8=7.2 | | graphy=-x^2+3 | | 1.03x=39140 | | 6x^2*9x=0 | | 2x^2+2y^2+16x+20y-16=0 |

Equations solver categories