If it's not what You are looking for type in the equation solver your own equation and let us solve it.
2t^2-9t+28=0
a = 2; b = -9; c = +28;
Δ = b2-4ac
Δ = -92-4·2·28
Δ = -143
Delta is less than zero, so there is no solution for the equation
| 15x+1200=300x+500 | | -12t^2+54t-168=0 | | 9x+42=-5x | | 51=(1.5)^x | | 5x-18=4x=180 | | -24x-24=x | | 2x-7=65=180 | | -23x-24=x | | 4x+8=72=180 | | –4j=2/3j+2–4j | | -11=x=(-48)=25 | | -1m=24+4m | | 15=20+h | | 20=15-h | | 3=14.68+x | | 3=14.68=x | | 14.68=3+x | | 6^2x+^1=216 | | x=3x14.68 | | 7n+7=3n+13 | | 1/3a=33 | | 2x+1/4=x+1/3-1 | | 40−9y)y=2 | | 40−9yy=2 | | 2x4x-7=23 | | (4x+6)7=2 | | x-33=33 | | 4m—23=71 | | -5x–5=-10x+30 | | 91=7(f-81) | | 33y=11 | | m+20/5=9 |