If it's not what You are looking for type in the equation solver your own equation and let us solve it.
-4x^2-12x+9=0
a = -4; b = -12; c = +9;
Δ = b2-4ac
Δ = -122-4·(-4)·9
Δ = 288
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{288}=\sqrt{144*2}=\sqrt{144}*\sqrt{2}=12\sqrt{2}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-12)-12\sqrt{2}}{2*-4}=\frac{12-12\sqrt{2}}{-8} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-12)+12\sqrt{2}}{2*-4}=\frac{12+12\sqrt{2}}{-8} $
| P=9/a | | C=0.07x+75,000 | | 5.6*10^-9=x | | y=4/50+50 | | a-19=16 | | F(u)=-2u-3 | | 16=r+12 | | 4^(7x-2)=5^x | | 4^(7x-2)=5x | | 6x3+5x2–4x=0 | | 6/x-0.2=0.48 | | n—9=-12 | | x5+1=3 | | 3-6p=5p-2 | | (x+3)+(2x-1)+(5x-7)=180 | | 3.2x4.6=14.72 | | 3/11=u/6 | | -9(w+4)=-2w-15 | | 3x+4x=52 | | x−15=4 | | -2x2-3x+20=0 | | 9=3(5)+b | | 4/5x+10=26 | | -2x2-3x=20 | | 220-30x=101+40x | | 6s2+7s-5=0 | | -7=5x-3 | | 2s-3=5+s | | -p2+2p=0 | | X^5-289x=0 | | 2.6(m-4)=-8 | | -4g=5g-3 |