If it's not what You are looking for type in the equation solver your own equation and let us solve it.
2e^2-7e-15=0
a = 2; b = -7; c = -15;
Δ = b2-4ac
Δ = -72-4·2·(-15)
Δ = 169
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$e_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$e_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{169}=13$$e_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-7)-13}{2*2}=\frac{-6}{4} =-1+1/2 $$e_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-7)+13}{2*2}=\frac{20}{4} =5 $
| 2,7x+9=-18 | | 1,000,000=6(20,000+8,000x) | | 3y-9=-2y+11 | | 4x+5=3x+2=x-3 | | 3n-8+2n=5(n-8) | | 3n-8-+2n=5(n-8) | | 20b+25=2b-5 | | 3n-8-2n=5(n-8) | | x+3/3=5-x-3/6 | | 5x-5=4x+15=6x-35 | | 3n-2n=5(n-8) | | 8x-23=3x+17 | | -22=7-3r+4 | | x/10+4=-5 | | 9k+7=3k-13 | | 16=3n=4 | | 124-x=8x+43 | | 3x/8-5x/8=-x/6-21/4 | | 16y+20=4y+1 | | 4m-8=2(2m-40 | | 6-x=12-7x | | 3(2x-5)=+19 | | 15x-33=10x+22 | | (4y-5)0₽=7) | | 784+25x=36x+817 | | 59-2x=64-3x | | 4(4y+5)=4y+1 | | 8x-7=67 | | 4a/9-8=5 | | 5e-9=7e-31 | | 12a+10a+14=80 | | 4x+54=126-2x |