If it's not what You are looking for type in the equation solver your own equation and let us solve it.
9x(x-7)=99
We move all terms to the left:
9x(x-7)-(99)=0
We multiply parentheses
9x^2-63x-99=0
a = 9; b = -63; c = -99;
Δ = b2-4ac
Δ = -632-4·9·(-99)
Δ = 7533
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{7533}=\sqrt{81*93}=\sqrt{81}*\sqrt{93}=9\sqrt{93}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-63)-9\sqrt{93}}{2*9}=\frac{63-9\sqrt{93}}{18} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-63)+9\sqrt{93}}{2*9}=\frac{63+9\sqrt{93}}{18} $
| X+2x+4x=119 | | y=4+2^2 | | X²+0x+16=0 | | 2^2x+5=2^101 | | 3w-4=1w-15+9 | | k-7=2k+5 | | 25=2r+13 | | Xx0.6=892800 | | 3p-6=1p-10 | | 2m+7=1m+15 | | 6=1x+50 | | 63x^2-45x+8=0 | | 2(y+1)(y-1)-y=2y-7 | | I2x-5=8x+17 | | −8(x−9)+9x=7(x−3)+9 | | 1/5t=2 | | u/6-1=2 | | 11(8r+3)-2(-9+6r)=0 | | 25p=20 | | 7x-12=2(5x+3) | | 5x-2(3x-1)=-5 | | 23=3x+2(3x-2) | | x+x+14=19 | | x/2-7=24 | | x-33=x+99 | | 4(2.5-x)=3(5.2x-15) | | 12-4x=7x+10 | | -2(6x-3)=12 | | 4(5x-7)=-18 | | x+4=x-10 | | 2+4y^2=y^2+14 | | 5+3y=4+5y |