X^2+13r+40=0

Simple and best practice solution for X^2+13r+40=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 X^2+13r+40=0 equation: 



X^2+13X+40=0

a = 1; b = 13; c = +40;
Δ = b2-4ac
Δ = 132-4·1·40
Δ = 9
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{9}=3$


$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(13)-3}{2*1}=\frac{-16}{2}
=-8
$


$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(13)+3}{2*1}=\frac{-10}{2}
=-5
$

See similar equations:

| 2(x+2)+3x=-6 | | 4.1g+5=1.1g+11 | | 5y=152 | | -4(k−6)=6(k+2) | | 32x=538 | | -6(x+5)+2=32 | | -103=-9g-13 | | 5)9(p-2)=8(p-2) | | 14x-100=40 | | 8m-40=-4(5m+3) | | 3x-3(1x+4)=8 | | 12x^2-24x-28=0 | | 7z-3-5z+11=180 | | 8s=-5+9s | | 8y-3y-15=76.60 | | 6q+14q=-20 | | 62+32x=600 | | 7x-12+9x-20=180 | | 2p+8=7p-7 | | y−52=–11 | | 5x-2+1x=10 | | 10m+3+9m=6 | | 4x-8=628 | | 17w+w-11w+1=8 | | -7+-3=x | | -7(3n-2)=-49 | | 144=-12(h+5) | | 5x-10-+50=9x-8 | | 8(2k-1)=72 | | 3r=4r-10 | | 4r+2r+2r-3r+r=18 | | 4(6-2n)+11=-37 |

Equations solver categories