If it's not what You are looking for type in the equation solver your own equation and let us solve it.
4x^2+8x-400=0
a = 4; b = 8; c = -400;
Δ = b2-4ac
Δ = 82-4·4·(-400)
Δ = 6464
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{6464}=\sqrt{64*101}=\sqrt{64}*\sqrt{101}=8\sqrt{101}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(8)-8\sqrt{101}}{2*4}=\frac{-8-8\sqrt{101}}{8} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(8)+8\sqrt{101}}{2*4}=\frac{-8+8\sqrt{101}}{8} $
| Z²-4z-5=0 | | 28*2=1802x=x= | | 6x+5÷-1=2x+3 | | x–5+x–6=3x–7 | | -x–8=-12 | | 4(2x-5)=3(3x-5) | | 20.25=14.5+5x | | y=-16(2-1)^2=60 | | 1/2x+5+30=90 | | -15+w=-34 | | 4q=–6+10q | | -5+15=5(5a-3) | | –9+5z=4z | | -36=(13/5)p-30 | | -66=2h | | 1/2(x-84)=3+8x | | –2−12q=–4q−8q−2 | | 9.6=1/2b | | 21+30+3x=90 | | 3(2x+1)+1=2(3x+2) | | -6(x+2)+4=-3x | | -25+f=32 | | y=-16^2+60 | | 6.7g+8=3.7g+12 | | 10x-2x+15=71 | | −9−6r=−2r−7r | | 9x-31+7x-2+4x+33=180 | | 8=x-(-4) | | `9d+4-2d=32` | | 3-2x=11+7x | | 128x+2x=180 | | 20x–50=75+15x |