2x^2-5x-12=1

Simple and best practice solution for 2x^2-5x-12=1 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-12=1 equation:


Simplifying
2x2 + -5x + -12 = 1

Reorder the terms:
-12 + -5x + 2x2 = 1

Solving
-12 + -5x + 2x2 = 1

Solving for variable 'x'.

Reorder the terms:
-12 + -1 + -5x + 2x2 = 1 + -1

Combine like terms: -12 + -1 = -13
-13 + -5x + 2x2 = 1 + -1

Combine like terms: 1 + -1 = 0
-13 + -5x + 2x2 = 0

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

Divide each side by '2'.
-6.5 + -2.5x + x2 = 0

Move the constant term to the right:

Add '6.5' to each side of the equation.
-6.5 + -2.5x + 6.5 + x2 = 0 + 6.5

Reorder the terms:
-6.5 + 6.5 + -2.5x + x2 = 0 + 6.5

Combine like terms: -6.5 + 6.5 = 0.0
0.0 + -2.5x + x2 = 0 + 6.5
-2.5x + x2 = 0 + 6.5

Combine like terms: 0 + 6.5 = 6.5
-2.5x + x2 = 6.5

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 = 6.5 + 1.5625

Reorder the terms:
1.5625 + -2.5x + x2 = 6.5 + 1.5625

Combine like terms: 6.5 + 1.5625 = 8.0625
1.5625 + -2.5x + x2 = 8.0625

Factor a perfect square on the left side:
(x + -1.25)(x + -1.25) = 8.0625

Calculate the square root of the right side: 2.839454173

Break this problem into two subproblems by setting 
(x + -1.25) equal to 2.839454173 and -2.839454173.

Subproblem 1

x + -1.25 = 2.839454173 Simplifying x + -1.25 = 2.839454173 Reorder the terms: -1.25 + x = 2.839454173 Solving -1.25 + x = 2.839454173 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 = 2.839454173 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = 2.839454173 + 1.25 x = 2.839454173 + 1.25 Combine like terms: 2.839454173 + 1.25 = 4.089454173 x = 4.089454173 Simplifying x = 4.089454173

Subproblem 2

x + -1.25 = -2.839454173 Simplifying x + -1.25 = -2.839454173 Reorder the terms: -1.25 + x = -2.839454173 Solving -1.25 + x = -2.839454173 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 = -2.839454173 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = -2.839454173 + 1.25 x = -2.839454173 + 1.25 Combine like terms: -2.839454173 + 1.25 = -1.589454173 x = -1.589454173 Simplifying x = -1.589454173

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.089454173, -1.589454173}

See similar equations:

| (x+10)(x-2)=(x+2)2 | | 16(16m+10)= | | 8y+4(2-y)=3(y-6)+10y | | 4x-12=5+3x | | s^2-10s-56=0 | | 12x+8y=1580 | | e^8x=9e^6x | | a=-2x^2+600 | | 10s^2+27s+18=0 | | x+6.94=9.89 | | -94-(-82)-43-(-62)= | | m(m-4)-m(m+2)=-4m-10 | | 7+2=x+1000000 | | 6(y+4)(y-2)= | | 5z-1=-14 | | 10x+6+13x-2+8x-1=360 | | b+14=6 | | -6x-4y=-4y-12 | | 2x^2+20x=-70 | | (-6a^6b)(4a^3b^4)= | | 4-5(3x+2)=-81 | | -9.81x^2+61=0 | | -3(-6)(-4)(3)= | | 5+6n=4n+5 | | x-6.27=9.3 | | 3h^2-5h+6=0 | | 0.1(x-2)+0.03(x-4)=0.02(10) | | -20+7t=5(2t-3) | | x-yi=5+6i | | 6y+15-5y=8 | | 71=5(4t+1)-3(2t-4)-2 | | 3x+a=a-9 |

Equations solver categories