5x^2-3x-28=0

Simple and best practice solution for 5x^2-3x-28=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^2-3x-28=0 equation:


Simplifying
5x2 + -3x + -28 = 0

Reorder the terms:
-28 + -3x + 5x2 = 0

Solving
-28 + -3x + 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'.
-5.6 + -0.6x + x2 = 0

Move the constant term to the right:

Add '5.6' to each side of the equation.
-5.6 + -0.6x + 5.6 + x2 = 0 + 5.6

Reorder the terms:
-5.6 + 5.6 + -0.6x + x2 = 0 + 5.6

Combine like terms: -5.6 + 5.6 = 0.0
0.0 + -0.6x + x2 = 0 + 5.6
-0.6x + x2 = 0 + 5.6

Combine like terms: 0 + 5.6 = 5.6
-0.6x + x2 = 5.6

The x term is -0.6x.  Take half its coefficient (-0.3).
Square it (0.09) and add it to both sides.

Add '0.09' to each side of the equation.
-0.6x + 0.09 + x2 = 5.6 + 0.09

Reorder the terms:
0.09 + -0.6x + x2 = 5.6 + 0.09

Combine like terms: 5.6 + 0.09 = 5.69
0.09 + -0.6x + x2 = 5.69

Factor a perfect square on the left side:
(x + -0.3)(x + -0.3) = 5.69

Calculate the square root of the right side: 2.385372088

Break this problem into two subproblems by setting 
(x + -0.3) equal to 2.385372088 and -2.385372088.

Subproblem 1

x + -0.3 = 2.385372088 Simplifying x + -0.3 = 2.385372088 Reorder the terms: -0.3 + x = 2.385372088 Solving -0.3 + x = 2.385372088 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3' to each side of the equation. -0.3 + 0.3 + x = 2.385372088 + 0.3 Combine like terms: -0.3 + 0.3 = 0.0 0.0 + x = 2.385372088 + 0.3 x = 2.385372088 + 0.3 Combine like terms: 2.385372088 + 0.3 = 2.685372088 x = 2.685372088 Simplifying x = 2.685372088

Subproblem 2

x + -0.3 = -2.385372088 Simplifying x + -0.3 = -2.385372088 Reorder the terms: -0.3 + x = -2.385372088 Solving -0.3 + x = -2.385372088 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3' to each side of the equation. -0.3 + 0.3 + x = -2.385372088 + 0.3 Combine like terms: -0.3 + 0.3 = 0.0 0.0 + x = -2.385372088 + 0.3 x = -2.385372088 + 0.3 Combine like terms: -2.385372088 + 0.3 = -2.085372088 x = -2.085372088 Simplifying x = -2.085372088

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.685372088, -2.085372088}

See similar equations:

| 20m^3-1310m^2=0 | | 0.25x+6=0.5x+4 | | 7/8(x-1/2)=49/80 | | .33m+3=.5m-7 | | 16x^2-18x=0 | | 22x+70=-95+17x | | 10m+6x-2=12 | | 1+5+7=30 | | 2r^2+11r+20=8 | | 7.3p-7.9=-6.9+6.3p | | x+(x+1)+(x+3)=30 | | a=5b+c | | 80+x^2=18x | | 2m^2-2m-2=0 | | 4ab+8j-2= | | x^2-84x=-5x | | 2m+4=11 | | x^2-26x=-56 | | ln*4x=3 | | -4(-7+4r)=-28-n | | 5-4x+3=-6x-8 | | 4x-8+3x=5x+10-4x | | 11x^4+37x^2+26=0 | | 9x-11=2-2x+9 | | u^2=16 | | 3x+26=1x+10 | | 10xlog(2x)=30 | | 5x/3-4=6 | | 4x+7=12x+20 | | x^2+3x=1-2 | | inx=-2.5 | | 100x=0 |

Equations solver categories