3(X+1)(X-2)=X(X+2)

Simple and best practice solution for 3(X+1)(X-2)=X(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 3(X+1)(X-2)=X(X+2) equation:


Simplifying
3(X + 1)(X + -2) = X(X + 2)

Reorder the terms:
3(1 + X)(X + -2) = X(X + 2)

Reorder the terms:
3(1 + X)(-2 + X) = X(X + 2)

Multiply (1 + X) * (-2 + X)
3(1(-2 + X) + X(-2 + X)) = X(X + 2)
3((-2 * 1 + X * 1) + X(-2 + X)) = X(X + 2)
3((-2 + 1X) + X(-2 + X)) = X(X + 2)
3(-2 + 1X + (-2 * X + X * X)) = X(X + 2)
3(-2 + 1X + (-2X + X2)) = X(X + 2)

Combine like terms: 1X + -2X = -1X
3(-2 + -1X + X2) = X(X + 2)
(-2 * 3 + -1X * 3 + X2 * 3) = X(X + 2)
(-6 + -3X + 3X2) = X(X + 2)

Reorder the terms:
-6 + -3X + 3X2 = X(2 + X)
-6 + -3X + 3X2 = (2 * X + X * X)
-6 + -3X + 3X2 = (2X + X2)

Solving
-6 + -3X + 3X2 = 2X + X2

Solving for variable 'X'.

Reorder the terms:
-6 + -3X + -2X + 3X2 + -1X2 = 2X + X2 + -2X + -1X2

Combine like terms: -3X + -2X = -5X
-6 + -5X + 3X2 + -1X2 = 2X + X2 + -2X + -1X2

Combine like terms: 3X2 + -1X2 = 2X2
-6 + -5X + 2X2 = 2X + X2 + -2X + -1X2

Reorder the terms:
-6 + -5X + 2X2 = 2X + -2X + X2 + -1X2

Combine like terms: 2X + -2X = 0
-6 + -5X + 2X2 = 0 + X2 + -1X2
-6 + -5X + 2X2 = X2 + -1X2

Combine like terms: X2 + -1X2 = 0
-6 + -5X + 2X2 = 0

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
-3 + -2.5X + X2 = 0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + -2.5X + 3 + X2 = 0 + 3

Reorder the terms:
-3 + 3 + -2.5X + X2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -2.5X + X2 = 0 + 3
-2.5X + X2 = 0 + 3

Combine like terms: 0 + 3 = 3
-2.5X + X2 = 3

The X term is -2.5X.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5X + 1.5625 + X2 = 3 + 1.5625

Reorder the terms:
1.5625 + -2.5X + X2 = 3 + 1.5625

Combine like terms: 3 + 1.5625 = 4.5625
1.5625 + -2.5X + X2 = 4.5625

Factor a perfect square on the left side:
(X + -1.25)(X + -1.25) = 4.5625

Calculate the square root of the right side: 2.136000936

Break this problem into two subproblems by setting 
(X + -1.25) equal to 2.136000936 and -2.136000936.

Subproblem 1

X + -1.25 = 2.136000936 Simplifying X + -1.25 = 2.136000936 Reorder the terms: -1.25 + X = 2.136000936 Solving -1.25 + X = 2.136000936 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + X = 2.136000936 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + X = 2.136000936 + 1.25 X = 2.136000936 + 1.25 Combine like terms: 2.136000936 + 1.25 = 3.386000936 X = 3.386000936 Simplifying X = 3.386000936

Subproblem 2

X + -1.25 = -2.136000936 Simplifying X + -1.25 = -2.136000936 Reorder the terms: -1.25 + X = -2.136000936 Solving -1.25 + X = -2.136000936 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + X = -2.136000936 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + X = -2.136000936 + 1.25 X = -2.136000936 + 1.25 Combine like terms: -2.136000936 + 1.25 = -0.886000936 X = -0.886000936 Simplifying X = -0.886000936

Solution

The solution to the problem is based on the solutions from the subproblems. X = {3.386000936, -0.886000936}

See similar equations:

| -2x-5=4t+8-6x | | s+49=50 | | 4(52-4)=42 | | a^2+4a+10= | | (2x+4)(2x+4)=100 | | y=2(x^2)+sqrt(3) | | 4x^2-3=6x | | 2x^4-14x^3+2x^2=0 | | 24+c+2=12+6c-46 | | t+17=22 | | 4(52-4)=4x | | 4x^4+4x^3+4x^3+4x^2=9x^2-12x+4 | | Y=14.44x+150 | | 2(y+5)+(2-3y)= | | 10x+9=-22+x | | 6x^2-5x-76=0 | | B+29=41 | | V=k-gt | | 12x=27+9x | | 4x^4+4x^3=13 | | a^2+13a-1= | | 2b+c+2=b+6c-46 | | a^3+13a-1= | | z^3=8i-8 | | 16x^2-56st+49t^2=0 | | X*x-8x+1=0 | | W^2-27=0 | | 7.2=x/2-5 | | 5z+9=z+25 | | 5x+173=12x-9 | | 20=5/9u | | cos(4x)+cos(2x)+cosx=0 |

Equations solver categories