If it's not what You are looking for type in the equation solver your own equation and let us solve it.
4n^2+20n-11=0
a = 4; b = 20; c = -11;
Δ = b2-4ac
Δ = 202-4·4·(-11)
Δ = 576
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$n_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$n_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{576}=24$$n_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(20)-24}{2*4}=\frac{-44}{8} =-5+1/2 $$n_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(20)+24}{2*4}=\frac{4}{8} =1/2 $
| 7v2+3v=0 | | 18p2-117p+99=0 | | 9x+x-5x=6•5 | | 49z2-13z=0 | | 2/3/x+1/3=1/3x+2/3 | | a-1=a-2 | | −2k−66 =31 | | 4/6=x/19 | | 4n2+36n+81=0 | | 6g2–96g+90=0 | | k2-44k=0 | | -32+6a=8(6a+8)+6a | | 32+98s=-6s2 | | 19j2+9j=0 | | -4(3x-9)=18-12 | | 3x+36=70 | | -6(1+3x)=36+3x | | 12p−5p=7 | | 11m2+7m-4=0 | | 5/6-2=-2/3x+1 | | 2u−2=2 | | 31-7x=-5(x-7) | | 47n2+5n=0 | | 3x+34=70 | | -1+k=-6(-4k+4) | | n2-21n=0 | | x–6=-15 | | 2x-6=155 | | n2-21=0 | | v2-10v+16=0 | | 3x/4+x=7 | | 0=12x^2-26x+20 |