x2+5x-28=0

Simple and best practice solution for x2+5x-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 x2+5x-28=0 equation:



x2+5x-28=0
We add all the numbers together, and all the variables
x^2+5x-28=0
a = 1; b = 5; c = -28;
Δ = b2-4ac
Δ = 52-4·1·(-28)
Δ = 137
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(5)-\sqrt{137}}{2*1}=\frac{-5-\sqrt{137}}{2} $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(5)+\sqrt{137}}{2*1}=\frac{-5+\sqrt{137}}{2} $

See similar equations:

| 4x+28=9x-13 | | -1x-29=13 | | x2-5x-28=0 | | 1/5(w-4)-3/4w=3 | | (X-2)^2+(x-2)^1=6 | | 2x2+10x-56=0 | | 6^(x-2)=17 | | 4x-9+2x=3x+5+3x | | 8a=17 | | 3/4z=-5/12 | | -2u+14u+3=8u+7 | | (y)2+11=0 | | 1/2x+3/5x-4=20-1/3x | | 2Q-5p=-19 | | -2u+14u+3=8u+37 | | 92+x/2=85 | | -3.1+2.1=0.7y-5.5 | | 4x^2+7x+12.25=320+12.25 | | x—8.1=5 | | -2u+14+3=8u+37 | | 85+x/2=92 | | 3.2=⅘(b-5) | | 3(3+y)+1=31 | | x/8.1=5 | | X^2+X^2+20x+100x=2500 | | 85+4x=92 | | 480=8t+16t^2 | | 1/2x+3/5x-4=201/3x | | 10^3y=5 | | .75(12x+12)=9x+5 | | -25b-74=b-126 | | 4(92)+x=85 |

Equations solver categories