If it's not what You are looking for type in the equation solver your own equation and let us solve it.
-5n^2+10n+15=0
a = -5; b = 10; c = +15;
Δ = b2-4ac
Δ = 102-4·(-5)·15
Δ = 400
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{400}=20$$n_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(10)-20}{2*-5}=\frac{-30}{-10} =+3 $$n_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(10)+20}{2*-5}=\frac{10}{-10} =-1 $
| 2x^2-3x-8=(-6) | | -7m^2+2m-5=0 | | 10x+20x-9+1=-7x+1-9 | | −9x−4+7x=4−6x | | 3x+2/5=9x | | 3(x-2)-8=4(1+x)+5 | | 3(x-2)-8=4(1+x)+15 | | 2x^2+x+2=-6 | | 2(3x+9)=5(x+4) | | -3x+4=9x+3 | | 5x+3=x+1- | | 98=2x+x | | 7-4(d-3)=2/ | | (7x+17)=(4x−15) | | 5^x-10=230 | | b2+4b-39=6 | | 10x-25=16x-5 | | 3(5x=4)-20=13x-4 | | 8y=18-y | | 11x=3x+40 | | -2(8x+2)=15 | | 5x+9=360 | | 1/2x-2=-1/3x-7 | | 4x+1=×+7 | | n/6=4-(-2) | | 5/8c=25 | | 10n+6=14 | | 6y+5=19 | | 2k^2+8k+3=-5 | | 10/3=2y | | 6x+93=14x-11 | | a–5=20 |