If it's not what You are looking for type in the equation solver your own equation and let us solve it.
7+5x-2x^2=8
We move all terms to the left:
7+5x-2x^2-(8)=0
We add all the numbers together, and all the variables
-2x^2+5x-1=0
a = -2; b = 5; c = -1;
Δ = b2-4ac
Δ = 52-4·(-2)·(-1)
Δ = 17
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(5)-\sqrt{17}}{2*-2}=\frac{-5-\sqrt{17}}{-4} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(5)+\sqrt{17}}{2*-2}=\frac{-5+\sqrt{17}}{-4} $
| 4y2=1 | | 8j=-72 | | 9x+0.5/5-2x+3/4=0 | | 3{y+1}=4y-21 | | N-1/2-n-2/3=n-4/7 | | (x+30)+(2x+90)+(4x+30)=360 | | 8—2x=5 | | 75x=60x | | (x+30)(2x+90)(4x+30)=360 | | 8.4=(x/80)/((200-x)/100) | | 8.4=(x/80)/((200-x)/100 | | 7(×+1)+2=5x+15 | | 3x20=5 | | 5x=25+30 | | x+6+9x+2x-4=180 | | .20x+.45(70)=38.5 | | 8-(x-1)(3-x)=4(x-1) | | 4m2+1=0 | | 9x3-12x+4=0 | | 8w=5w+6 | | 3y=5y-8/9 | | 1=1/x^2+2x+x-1/x | | 5n-7=-8 | | -4=-5u+2(u-5) | | 16x-9=50+34x | | 6x+17=2x+10 | | 2y+3=3(5y+7) | | (x-8)(2x+10)=(x+2)(x-1) | | (5c+3)=(3c-8) | | -8+x=x-3/8 | | 3y=5y-(8/5) | | 3z+4=7-2z |