If it's not what You are looking for type in the equation solver your own equation and let us solve it.
4x^2-15x-91=0
a = 4; b = -15; c = -91;
Δ = b2-4ac
Δ = -152-4·4·(-91)
Δ = 1681
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{1681}=41$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-15)-41}{2*4}=\frac{-26}{8} =-3+1/4 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-15)+41}{2*4}=\frac{56}{8} =7 $
| .11x+52=59+.09x | | 678+16.5x=44.75x | | 3c+2.5=3.5 | | X2-200x+9200=0 | | X2-200x+9600=0 | | 5/4+1=2x-9/4 | | (3^x×2)^3=729 | | 4(x+1)=76 | | 4(x+1)=77 | | 7y/5y=y-4 | | 2ⁿ+n=11 | | 2^(x)+x=11 | | x+(x-6)+(x+12)=180 | | X+10=2.25x | | x/4+6=−14 | | -v/7=-43 | | 2x2+4x−70=0 | | Z-2y=3 | | 11=-6x-4x-9 | | 0.5x/5.5x+0.1=1/5 | | (x-2)(x+4)=(-x-4)(x+2) | | 3.5x-2.9=1.7x-1.1 | | 4y=64/2y | | X+y-20=0 | | V=(8-2x) | | 3x^4-4x^3-14x^2-4x+3=0 | | 1y+3y=4 | | x-150=600 | | x=600-20x | | x-20x=600 | | 3x2-21x-24=0 | | 3r2+2r+4=0 |