If it's not what You are looking for type in the equation solver your own equation and let us solve it.
4a^2+19a+21=0
a = 4; b = 19; c = +21;
Δ = b2-4ac
Δ = 192-4·4·21
Δ = 25
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$a_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$a_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{25}=5$$a_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(19)-5}{2*4}=\frac{-24}{8} =-3 $$a_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(19)+5}{2*4}=\frac{-14}{8} =-1+3/4 $
| X=(x+20) | | –1=4.4n–6.94 | | 236=-v+42 | | 99=274-y | | -v+293=237 | | c2=48-2c | | 2y=4/3-8 | | -y+224=149 | | 0=90+50x-16x^2 | | -u+104=225 | | z/4−3=2 | | 198=27-w | | z/4− 3=2 | | x-0.02x=96 | | 15=6+3z | | 2(3c+1)=40 | | 3(r+1.6)-8r=9.2 | | (9x-8)(7x+7)=0 | | 12+x/4=28 | | 1/3s+14=25 | | 5(5y=1)=25y | | -15x-16=6x+3 | | 2m-2+4(m+1)=50 | | 4x+13=-8x-19 | | 5.2x−1.6=40 | | 6x-14=-7x+3 | | 17w-4w+27=4w-8 | | -2.8+b=1.2+0.8b | | -16x-17=-18x+3 | | 5x+3x-3=0. | | -9x+8=-5x+11 | | H(t)=40-9.8t^2 |