2x^2-5x-17=12

Simple and best practice solution for 2x^2-5x-17=12 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 2x^2-5x-17=12 equation:


Simplifying
2x2 + -5x + -17 = 12

Reorder the terms:
-17 + -5x + 2x2 = 12

Solving
-17 + -5x + 2x2 = 12

Solving for variable 'x'.

Reorder the terms:
-17 + -12 + -5x + 2x2 = 12 + -12

Combine like terms: -17 + -12 = -29
-29 + -5x + 2x2 = 12 + -12

Combine like terms: 12 + -12 = 0
-29 + -5x + 2x2 = 0

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

Divide each side by '2'.
-14.5 + -2.5x + x2 = 0

Move the constant term to the right:

Add '14.5' to each side of the equation.
-14.5 + -2.5x + 14.5 + x2 = 0 + 14.5

Reorder the terms:
-14.5 + 14.5 + -2.5x + x2 = 0 + 14.5

Combine like terms: -14.5 + 14.5 = 0.0
0.0 + -2.5x + x2 = 0 + 14.5
-2.5x + x2 = 0 + 14.5

Combine like terms: 0 + 14.5 = 14.5
-2.5x + x2 = 14.5

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 = 14.5 + 1.5625

Reorder the terms:
1.5625 + -2.5x + x2 = 14.5 + 1.5625

Combine like terms: 14.5 + 1.5625 = 16.0625
1.5625 + -2.5x + x2 = 16.0625

Factor a perfect square on the left side:
(x + -1.25)(x + -1.25) = 16.0625

Calculate the square root of the right side: 4.007804885

Break this problem into two subproblems by setting 
(x + -1.25) equal to 4.007804885 and -4.007804885.

Subproblem 1

x + -1.25 = 4.007804885 Simplifying x + -1.25 = 4.007804885 Reorder the terms: -1.25 + x = 4.007804885 Solving -1.25 + x = 4.007804885 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 = 4.007804885 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = 4.007804885 + 1.25 x = 4.007804885 + 1.25 Combine like terms: 4.007804885 + 1.25 = 5.257804885 x = 5.257804885 Simplifying x = 5.257804885

Subproblem 2

x + -1.25 = -4.007804885 Simplifying x + -1.25 = -4.007804885 Reorder the terms: -1.25 + x = -4.007804885 Solving -1.25 + x = -4.007804885 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 = -4.007804885 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = -4.007804885 + 1.25 x = -4.007804885 + 1.25 Combine like terms: -4.007804885 + 1.25 = -2.757804885 x = -2.757804885 Simplifying x = -2.757804885

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.257804885, -2.757804885}

See similar equations:

| 3[x+7]=7x-15 | | 4(2x+1)=2x+35 | | 5x-11=2x+16 | | 5x+7+3x-11=32 | | 2x+x-7=14 | | 9x+5=4x+150 | | 108-7x=29x+24 | | 7-8x=73-22x | | 6x+6=-69-9x | | -51-2x=13-10x | | y=ax^2+bx+c | | 1+11x=31+x | | 3x^3+8x^2+3x-2=0 | | 1+4=10+x | | 2x-3=11x-84 | | 2x+25=12x-25 | | 2x-(x-3)=5 | | x^2=2x+15 | | 4x+7=41 | | 4(x-2)=24 | | X^2=4x+45 | | 9x+6=3x+24 | | 2(7+7m)=7(7+3m) | | 3(2x-11)=3(x+10) | | -3n+2(5)=2(11) | | 3x+1=-6(x+4) | | 66-4x=7x+22 | | 2.41x-6=7.3 | | 7(2x-1)=8+x | | 9wr=81 | | y+v=w | | v-4.025=1.9024 |

Equations solver categories