I don’t know
10(2k + 5)
20k could mean 20000 so 20k + 50 = 20050 Or if k is a variable, 20k + 50 can be reduced to 10(2k+5) or similar. The question is ambiguous.
20K + 5010(2K + 5)=============all that can be factored here
(4k + 5)(5k - 9)
No, 50 is a factor of 400.
No, 9 is not a factor of 50.
No, 25 is a factor of 50.
1500-20k = 1480
The factor tree of 50:5025,25,5,25025,25,5,2
50 is a factor of all the multiples of 50: 50, 100, 150, 200, etc.
One is the only factor of 50 that is a cube.