If it's not what You are looking for type in the equation solver your own equation and let us solve it.
(n+6)(n-9)=0
We multiply parentheses ..
(+n^2-9n+6n-54)=0
We get rid of parentheses
n^2-9n+6n-54=0
We add all the numbers together, and all the variables
n^2-3n-54=0
a = 1; b = -3; c = -54;
Δ = b2-4ac
Δ = -32-4·1·(-54)
Δ = 225
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$n_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$n_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{225}=15$$n_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-3)-15}{2*1}=\frac{-12}{2} =-6 $$n_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-3)+15}{2*1}=\frac{18}{2} =9 $
| 6(x-2)-6=-6(-2x+6)-2x | | 15(8-y)+8y=85 | | 7x+6=-8+3×+22 | | 40x=140-30x | | 32+12t-15t^2=0 | | 14-4n=8n+2 | | Y+7y+10y=0 | | 9-22x=11 | | 7.2=3^2n/2.5 | | 3^2n=18 | | 4+x=10+(x+9) | | 40=11x-3x | | 2=9+v | | 3|x-4|=|2x+5| | | (x+6)(x-4)=(2x+5)(x-4) | | 4(x+1)+6=4x+10 | | 64=3v+5v | | 3(x+5)=3x+10 | | 17u-8u=54 | | 7x+11=9+x | | 5+x=20+x | | (3p/p-5)-(2/p-3)=p/p+3 | | 3.4^x=11 | | 9(x-10)+3x=12 | | -6x+3x=5(-4x+7)+3(-7+5x) | | -3a+2(a+3)=4a-7(3+2a) | | N=0.8(210-a) | | 2(4+3n)-3(n+4)=-7n+6n | | -44-10x=-7(x+8) | | 3-(x+2)=2(x-3)-3(x-2) | | 4+x=19+x | | 6(3-4a)=54-12a |