If it's not what You are looking for type in the equation solver your own equation and let us solve it.
-7x^2+7x+16=0
a = -7; b = 7; c = +16;
Δ = b2-4ac
Δ = 72-4·(-7)·16
Δ = 497
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{-(7)-\sqrt{497}}{2*-7}=\frac{-7-\sqrt{497}}{-14} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(7)+\sqrt{497}}{2*-7}=\frac{-7+\sqrt{497}}{-14} $
| 12-5a=2a-30 | | 3x-5=7-9 | | d/12+25=29D= | | -4(1+3v)=100 | | 3+2b=-1 | | 6x–12=-11+6x–2 | | 5x−6≥=9 | | 7−3p=25 | | 116+(5x-1)=90 | | 2(x-3)^2-7=-57 | | 12+2.5h=19.50 | | h/9-19=-10H= | | 3x-960=x+240 | | A=100m2 | | 7(b+1)=14 | | −2=a−2+3 | | w/4-21=-3H= | | 6y-1=180 | | 4x+4=4x-20 | | -3+2t=9 | | 70=7(h+4) | | 11p+1=12 | | (X)=4;x=4 | | 9y=6+7y | | 7(-6=3n)=6(n-2) | | (5x+42)+(7x+90)=180 | | 14=v/2+ 12 | | 6x=0.25 | | 116+(5x-1)=180 | | (X)=4;x=4,-4 | | 43a+10=26a27 | | 0,25t^2−2t+5=0 |