Given:
Tom's earnings: x
Jan's earnings: 2x - 150
Total earnings: 1380
x + 2x - 150 = 1380
3x = 1380 + 150
3x = 1530
3x/3 = 1530/3
x = 510
Tom's earnings: x = 510
Jan's earnings: 2x - 150 = 2(510) - 150 = 1,020 - 150 = 870
total earnings: 1,380
510 + 870 = 1,380
1,380 = 1,380
The error is that there is not a decimal point in front of the 2
Correct: 5.8 - .2 = 5.6
Since 
and 
are roots of 
, we can factorize the quadratic in terms of the roots as
Expanding the right side gives
so that
A polynomial with roots 
and 
would be
and expanding this gives
Now,
and
So we can write the second quadratic in terms of 
as
and to make things look cleaner, scale the whole expression by 
to get
Here is the mistake is on 9x1/100 because after decimal 9 is there means
9 has to be multiplied by 1/10 to get the 0.9
Here if we expand the 103.903 then from left to right
1 = 1x100 +
0 = 0x10 +
3 = 3x1 +
9 = 9x1/10+
0 = 0x1/100+
3 = 3x1/1000 = 103.903
