If it's not what You are looking for type in the equation solver your own equation and let us solve it.
13x^2+12x-77=0
a = 13; b = 12; c = -77;
Δ = b2-4ac
Δ = 122-4·13·(-77)
Δ = 4148
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{4148}=\sqrt{4*1037}=\sqrt{4}*\sqrt{1037}=2\sqrt{1037}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(12)-2\sqrt{1037}}{2*13}=\frac{-12-2\sqrt{1037}}{26} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(12)+2\sqrt{1037}}{2*13}=\frac{-12+2\sqrt{1037}}{26} $
| 7x=2.75 | | 2m-5=3(5-m) | | -y^2+13y=40 | | 180=(x+28)+x | | 2y/3+10=12 | | y/5+3=7 | | 1/6=x/3506 | | 0.5=10^-x | | 200000x+.3x=170000 | | X^4+11x+24=0 | | 8x+6=4x-38 | | F(x)=-4^2+8 | | 200=12/x | | (+0.8x)*3(6x-7.2))-(1+(0.12)*3(6x-7.2))=0 | | F(x)=-3x^2+2x+11 | | 30+8x=54 | | 2x+15=4x-20+7 | | 144/k=9 | | 1/2m+8=10 | | 12=32-5c | | 45x=22 | | 15^2=4(x+2) | | 2x-56000=0.25x | | 4=(y=3)=2y-(5y-27) | | (3x+2)–2(x+4)=7 | | $450=9x | | 60-b=32 | | f+15=35 | | 0=16t-0.8t^2 | | 7x-3x=56 | | 3x^2-4x+6=36 | | 40=16t-0.8t^2 |