x^2-3x=2

Simple and best practice solution for x^2-3x=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^2-3x=2 equation:


Simplifying
x2 + -3x = 2

Reorder the terms:
-3x + x2 = 2

Solving
-3x + x2 = 2

Solving for variable 'x'.

Reorder the terms:
-2 + -3x + x2 = 2 + -2

Combine like terms: 2 + -2 = 0
-2 + -3x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + -3x + 2 + x2 = 0 + 2

Reorder the terms:
-2 + 2 + -3x + x2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -3x + x2 = 0 + 2
-3x + x2 = 0 + 2

Combine like terms: 0 + 2 = 2
-3x + x2 = 2

The x term is -3x.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3x + 2.25 + x2 = 2 + 2.25

Reorder the terms:
2.25 + -3x + x2 = 2 + 2.25

Combine like terms: 2 + 2.25 = 4.25
2.25 + -3x + x2 = 4.25

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 4.25

Calculate the square root of the right side: 2.061552813

Break this problem into two subproblems by setting 
(x + -1.5) equal to 2.061552813 and -2.061552813.

Subproblem 1

x + -1.5 = 2.061552813 Simplifying x + -1.5 = 2.061552813 Reorder the terms: -1.5 + x = 2.061552813 Solving -1.5 + x = 2.061552813 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 2.061552813 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 2.061552813 + 1.5 x = 2.061552813 + 1.5 Combine like terms: 2.061552813 + 1.5 = 3.561552813 x = 3.561552813 Simplifying x = 3.561552813

Subproblem 2

x + -1.5 = -2.061552813 Simplifying x + -1.5 = -2.061552813 Reorder the terms: -1.5 + x = -2.061552813 Solving -1.5 + x = -2.061552813 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -2.061552813 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -2.061552813 + 1.5 x = -2.061552813 + 1.5 Combine like terms: -2.061552813 + 1.5 = -0.561552813 x = -0.561552813 Simplifying x = -0.561552813

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.561552813, -0.561552813}

See similar equations:

| 1+n+2n=4 | | 3u^3*4y^2u^8*3y= | | 6k+2k=16 | | 9x-2=7x+32 | | 4x^2+20x-36=0 | | 3x+12=27 | | x^2+18x-7=0 | | 10c^2+23c-42=0 | | (7w^2-4w-1)+(3w^2-6w+2)= | | 2n=69 | | 2[-(x-1)+4]=5+[-(6x-7)+9x] | | 2x+8x-10=180 | | 55h+275=440 | | 257-7x=38x+17 | | 7-10x=115-31x | | -7-10x=115-31x | | x+(x+29)+(3x-38)=531 | | 2x^3-5x^2-14x+35=0 | | 3+6=x-9 | | 2P^2+2P-1=0 | | 4x=-21x+3 | | x+0.7=5.8 | | 0.50x+0.25(30)=24.5 | | 7=x+17 | | -32-3x=8-8x | | 2x+450000=625000000 | | 66-4x=10x+24 | | 6x-3(5x+2)=4(1-x) | | 15x^2+13x=0 | | -6+x=14 | | 5x+19=15x-71 | | 5(c-9)=-20 |

Equations solver categories