If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x2+15x+25=0
We add all the numbers together, and all the variables
x^2+15x+25=0
a = 1; b = 15; c = +25;
Δ = b2-4ac
Δ = 152-4·1·25
Δ = 125
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{125}=\sqrt{25*5}=\sqrt{25}*\sqrt{5}=5\sqrt{5}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(15)-5\sqrt{5}}{2*1}=\frac{-15-5\sqrt{5}}{2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(15)+5\sqrt{5}}{2*1}=\frac{-15+5\sqrt{5}}{2} $
| 6x-21=14+4x | | 6x-21=14+4 | | 5q2–9q+1=0 | | 811/15=7x/15 | | n+42=(-18) | | 35-e=10 | | -s-8s+5=-7-6s | | 1.25-5x=0.8 | | 9y2+y+1=0 | | k+151=636 | | |2a-6|=0 | | 2(-8+7x)=138 | | x=2^7(0)(-128) | | 5x+100+x=500 | | y=1.50 | | 150-2x=78 | | x=2^70(-128) | | 15-6m=27 | | M(t)=1000⋅(1.01) | | d/20+1200+d/12=1440 | | n-29=9-34) | | M(t)=1000⋅(1.01)2 | | 7(1+8n=) | | –6r−20=–2r+4r+12 | | 0.002x=10 | | 7.5x-4.1=6.7–4.5x | | x=604÷ | | x=2^(7)0(-128) | | 12x+6=8x+12 | | 9=u+26/8 | | 12x+40=8x+28 | | 3v−1=2v−7 |