If it's not what You are looking for type in the equation solver your own equation and let us solve it.
-4x^2-5x+9=0
a = -4; b = -5; c = +9;
Δ = b2-4ac
Δ = -52-4·(-4)·9
Δ = 169
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{169}=13$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-5)-13}{2*-4}=\frac{-8}{-8} =1 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-5)+13}{2*-4}=\frac{18}{-8} =-2+1/4 $
| -8+3(m+4)=-2+2m | | 39=4x-x-2 | | -4+1/3r=0 | | 213=2x+7(4x+9) | | -j−-16j−-8j−10j=-13 | | (1/2)32t^2+16t=896 | | -301=7(5+8n) | | 40-20x-x^2=0 | | 3p-2p=17 | | 3x=2x+44 | | 3(x-5)-12=2(x-6)=2 | | 7/10x=3/20+5 | | 7a=85-18a | | -18b+15b+7b=-16 | | 3/4b=5/6 | | -5(3+4n)=-15+6n | | 2x-3.9=-3.5 | | 96=3v-3(-4v+8) | | 4u-2=26 | | -3(4n-5)=99 | | 2x+34-(4(x)=0 | | 5x-34=4x-23 | | k-45=27 | | 7v+5(7v-6)=306 | | 1-x=x+2+3(1-x) | | .33x+.5x=6=11 | | -121=-7+6(-4x-7) | | -18=2x+2(-2x-19) | | 1/w^2=(48001)/(8000) | | 2x-x+2+5x=32 | | 2(1-2x)=1x-2+2(5-3x) | | -9,4a+4,5=0 |