5x^2-19x-20=0

Simple and best practice solution for 5x^2-19x-20=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 5x^2-19x-20=0 equation:


Simplifying
5x2 + -19x + -20 = 0

Reorder the terms:
-20 + -19x + 5x2 = 0

Solving
-20 + -19x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
-4 + -3.8x + x2 = 0

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + -3.8x + 4 + x2 = 0 + 4

Reorder the terms:
-4 + 4 + -3.8x + x2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -3.8x + x2 = 0 + 4
-3.8x + x2 = 0 + 4

Combine like terms: 0 + 4 = 4
-3.8x + x2 = 4

The x term is -3.8x.  Take half its coefficient (-1.9).
Square it (3.61) and add it to both sides.

Add '3.61' to each side of the equation.
-3.8x + 3.61 + x2 = 4 + 3.61

Reorder the terms:
3.61 + -3.8x + x2 = 4 + 3.61

Combine like terms: 4 + 3.61 = 7.61
3.61 + -3.8x + x2 = 7.61

Factor a perfect square on the left side:
(x + -1.9)(x + -1.9) = 7.61

Calculate the square root of the right side: 2.758622845

Break this problem into two subproblems by setting 
(x + -1.9) equal to 2.758622845 and -2.758622845.

Subproblem 1

x + -1.9 = 2.758622845 Simplifying x + -1.9 = 2.758622845 Reorder the terms: -1.9 + x = 2.758622845 Solving -1.9 + x = 2.758622845 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.9' to each side of the equation. -1.9 + 1.9 + x = 2.758622845 + 1.9 Combine like terms: -1.9 + 1.9 = 0.0 0.0 + x = 2.758622845 + 1.9 x = 2.758622845 + 1.9 Combine like terms: 2.758622845 + 1.9 = 4.658622845 x = 4.658622845 Simplifying x = 4.658622845

Subproblem 2

x + -1.9 = -2.758622845 Simplifying x + -1.9 = -2.758622845 Reorder the terms: -1.9 + x = -2.758622845 Solving -1.9 + x = -2.758622845 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.9' to each side of the equation. -1.9 + 1.9 + x = -2.758622845 + 1.9 Combine like terms: -1.9 + 1.9 = 0.0 0.0 + x = -2.758622845 + 1.9 x = -2.758622845 + 1.9 Combine like terms: -2.758622845 + 1.9 = -0.858622845 x = -0.858622845 Simplifying x = -0.858622845

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.658622845, -0.858622845}

See similar equations:

| 6.6x-1.7=18.1 | | 6=(s-3/4)-20 | | 0.043=w(1+-0.59w) | | 0.04=w(1-0.59w) | | qd=y-3p | | 4m^2+16m-180=0 | | y+(-18)=-3y+2 | | 4+2x=6+3x | | 3(sec^2)x+(-6)=0 | | 3sec^2x-6=0 | | 17765/646 | | 3(x-2)-12= | | (6-6i)(5+i)=0 | | (18x-12y+30z)= | | r*r=3(4+r) | | -8+5=-13y | | 16+13r+11k-5r-3k+27= | | 4x^2+4y^2+8y=16 | | 2y-1-1=1y-3-(-5+y) | | 3500/30=10x | | .03x^2-33x+15000=13000 | | 4(3-x)=-4x+12 | | n^2+26n+169=0 | | log(4)(5x-9)=2 | | -4(x-2)=x-2 | | 3x-6=3x+5 | | 4(-4e-5)= | | 8x-1=-1+8x | | 6(x+1)+5= | | 3/14x7/10= | | 5y+14=10y+12 | | -13=-5(1+4m)-2m |

Equations solver categories