If it's not what You are looking for type in the equation solver your own equation and let us solve it.
(3x+9)(3x-9)=0
We use the square of the difference formula
9x^2-81=0
a = 9; b = 0; c = -81;
Δ = b2-4ac
Δ = 02-4·9·(-81)
Δ = 2916
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{2916}=54$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-54}{2*9}=\frac{-54}{18} =-3 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+54}{2*9}=\frac{54}{18} =3 $
| 2(2x-5)+3x=4 | | v/21=8/13 | | x+3+7=2x+10-x | | 3p/4-27=-33 | | 7x+8–2x=38 | | x-(x*0,2)-10=60 | | 3.7x+8–2x=38 | | -6v-10=5v+1 | | 18x-3+44+6+25x=180 | | -28-8x=4(5x-7 | | 6(5+x)=96 | | 7(m+6)=49 | | 945=15u | | 8w-6w=-20 | | -17+5k=4(6k-9) | | -10n=-8n-8 | | 4(x+5)=9x+4x−34, | | 5^(3x-7)=25 | | 5=-(h+3) | | -3x-3=-3(1+x) | | 10-9f=10+f | | 3j+12=21 | | x-(x*0,2)-10-60=100 | | 3(x+4)=x4 | | -4v=-7-3v | | 4(-6g+2)+8(-6g)=56 | | 04x+10=9 | | 4(3x+6)-8=2(x+8 | | (5x)-(x-18)=180 | | 3y+-4=10 | | g+52=60;g=8 | | 8+r-8=-3+4r |