-2x*x-5x-8=0

Simple and best practice solution for -2x*x-5x-8=0 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*x-5x-8=0 equation:


Simplifying
-2x * x + -5x + -8 = 0

Multiply x * x
-2x2 + -5x + -8 = 0

Reorder the terms:
-8 + -5x + -2x2 = 0

Solving
-8 + -5x + -2x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '-1'.
-1(8 + 5x + 2x2) = 0

Ignore the factor -1.

Subproblem 1

Set the factor '(8 + 5x + 2x2)' equal to zero and attempt to solve: Simplifying 8 + 5x + 2x2 = 0 Solving 8 + 5x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. 4 + 2.5x + x2 = 0 Move the constant term to the right: Add '-4' to each side of the equation. 4 + 2.5x + -4 + x2 = 0 + -4 Reorder the terms: 4 + -4 + 2.5x + x2 = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 2.5x + x2 = 0 + -4 2.5x + x2 = 0 + -4 Combine like terms: 0 + -4 = -4 2.5x + x2 = -4 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 = -4 + 1.5625 Reorder the terms: 1.5625 + 2.5x + x2 = -4 + 1.5625 Combine like terms: -4 + 1.5625 = -2.4375 1.5625 + 2.5x + x2 = -2.4375 Factor a perfect square on the left side: (x + 1.25)(x + 1.25) = -2.4375 Can't calculate square root of the right side. The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.

See similar equations:

| 2x*x+2x-8=0 | | 2x*x+2x-8=8 | | x*x-2x-6=0 | | x*x+x-3=0 | | 7x=2x+15 | | -10x+6=-8x | | 4x=5x+3 | | 8x-29=10x+33 | | 5n+10n-75=0 | | 2x+5=1+6 | | 5+2x=6+1 | | X+5.3=6.4 | | 1.8=0.2 | | 3=7-2p | | 15=m+7 | | 4x^2+31x+46=0 | | X-(-42)=-27 | | x^4+34x^2+225=0 | | t=5t | | -2(3x+15)-12=112+80 | | -4(-3x-5)=260 | | -4(-2x-3)=-812 | | 3x+10-3=67 | | -4+12t=-100 | | 6(2x-4)=12 | | 2x=21-C | | -8x+6x=-2x-7 | | -3x=-8+2x | | 7(2x-4)=12 | | 32-5x=-8 | | 6m= | | -1+6x=-67 |

Equations solver categories