If it's not what You are looking for type in the equation solver your own equation and let us solve it.
X^2-3X-7.75=0
a = 1; b = -3; c = -7.75;
Δ = b2-4ac
Δ = -32-4·1·(-7.75)
Δ = 40
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}$$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{40}=\sqrt{4*10}=\sqrt{4}*\sqrt{10}=2\sqrt{10}$$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-3)-2\sqrt{10}}{2*1}=\frac{3-2\sqrt{10}}{2} $$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-3)+2\sqrt{10}}{2*1}=\frac{3+2\sqrt{10}}{2} $
| 2n+2=2+3 | | 3x-5(x-2)=-9+5x-37 | | 60=-5t^2+40t+40 | | 1x+18=6+4x+1x | | (20x+5)+(24x—)=180 | | -4(4m-1)-5=3m-20 | | x+18=6+4+x | | X+(x÷2+12)=90 | | 32=3y-13 | | (n+3)(n-5)=48 | | X+x÷2=90 | | 2k+1.8=4k-4.4 | | (7a-4)=(4a-41) | | −0.75x−5=0.25x | | 16=u/3+9 | | (x/2)+(x/3)=75 | | U(x)=5,0x³-4,0x²+3,0x, | | 64m^2-36=0 | | -3(r-2)=8r+6 | | 2(b+8)=4(b-6) | | 6x+3=-6+2x+21 | | 2.5+5a=3a+10.5 | | -8x-9=5x-4 | | 3(x+1)-5=3x-1 | | 2^(x+2)=128 | | 4^(2x-1)=8^x | | 200=|300y-100| | | 3=-0.2(x^2)+1.3x | | 3=-0.x(x^2)+1.3x | | -5=w-55-8 | | 3=-0.3(x^2)+1.3x | | n+n+2n=48 |