If it's not what You are looking for type in the equation solver your own equation and let us solve it.
(u+9)(u-4)=0
We multiply parentheses ..
(+u^2-4u+9u-36)=0
We get rid of parentheses
u^2-4u+9u-36=0
We add all the numbers together, and all the variables
u^2+5u-36=0
a = 1; b = 5; c = -36;
Δ = b2-4ac
Δ = 52-4·1·(-36)
Δ = 169
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$u_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$u_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{169}=13$$u_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(5)-13}{2*1}=\frac{-18}{2} =-9 $$u_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(5)+13}{2*1}=\frac{8}{2} =4 $
| 9y-8+15=6y+37 | | 8(1-x)-(x-7)=-2x-6x | | 128-3x=15x-8 | | x/16-5=-6 | | 3.3+26.4-x=1.2 | | 121-10x=20x+19 | | 62=14-4x | | 2/7x=4/7x+2 | | 6b+8-4b=5b-28 | | -4x+8=27+6x | | 4y-6=y+93 | | 14+2/7x-20=4(1/7x-1) | | 12-2x+1=59 | | 12+1.5n=15+0.5n | | -4m+8=27+6m | | 146-x=253 | | 2(y-4)-6y=12 | | w=50+15T | | 1^2m=-35 | | 2x^2+3x+4x=3-7x | | 1^9y=-2 | | 12^-9x=13^x+7 | | 1-(2x+5)=7 | | 24x+72=4(6x+)-4 | | 3w+15-6=9+4w | | 66=2(b+2)-5(-5-7b) | | x+16+11x=13x+11 | | 11x+10x+2=20x+16 | | 3+4x=8-2x-8x | | 6x+15x-14=17x-2 | | -8+h=9-4h | | 67=-v+191 |