If it's not what You are looking for type in the equation solver your own equation and let us solve it.
4f(-2-11)=0
We add all the numbers together, and all the variables
4f(-13)=0
We multiply parentheses
-52f=0
f=0/-52
f=0
| 8x+1+67=180 | | 3n^2=7n-5 | | 8x²-33x+4=0 | | Y+8x=792 | | 3/x=5+(4+3)*5/5*(56-8) | | -18=2x^2+15x | | 7p2-7p=7p. | | 6x-4x=45 | | (8x-9)=56x-63 | | X+8-y=700 | | 2(x-4)+7(-20)=4x | | a2-81=(a+)(a-) | | X+y+8=700 | | 6b+9=2b+7 | | X-y=700 | | 10*{1,5+1,3x)=3x+25 | | 5x-120=10x+35 | | 20y=–12 | | 5x-120=10x+34 | | b-11=-12 | | 1/3x131/3=5/12 | | 10x+25=15x+25 | | 12m2+7m=12 | | 3m^2-90=-3m | | 8=32-4,8x | | b²=30+11b | | q2+14q=32 | | 4(6-8a)=24 | | 4x+10=3₩ | | 3+2(x-7)=9 | | x-√x+6=3 | | 9x-4=-3x+2 |