If it's not what You are looking for type in the equation solver your own equation and let us solve it.
-3x(x+2)=9
We move all terms to the left:
-3x(x+2)-(9)=0
We multiply parentheses
-3x^2-6x-9=0
a = -3; b = -6; c = -9;
Δ = b2-4ac
Δ = -62-4·(-3)·(-9)
Δ = -72
Delta is less than zero, so there is no solution for the equation
| 6(3s+8)=12 | | 7x2-9x+2=0 | | (x×1.7)-x=10 | | 4+2/3+2y=4 | | y=0.25(1)+3.5 | | 300x=12+42x | | 9/6x=1 | | X^2+5x=10-4x | | 4x-6=3x+15 | | 5.8x=34 | | X×1.7-x=10 | | 2x2-18=128 | | x^2+3x=115 | | 4(x-6)=10x+6 | | X=(-33/60)y+20/60 | | (5x+1)(2x+3)=0 | | -3=7(y-9/7$ | | 5^x+3=7^x | | 5^x+3=7x | | 2x-4-x/2=3 | | 2x-7=4(3x-2) | | (2x-1)²=36 | | 2x+4+12x=2 | | 8x+7=9×-10 | | 3-(5x+1)=4(2x+3) | | √x^2=0 | | x-(x*0.16)=13,500.00 | | x-(x*0.16)=13,500 | | 99-3x=3x=3x+21 | | -2|w|=-4 | | 10x+8=2x-24 | | 2x11=65-4x |