Hey thanks for helping out

Question 5 is not a typo, Could you please explain on question 6, im still lost

Sorry i have another quick question

hey sorry to bother you, but i really want to learn.

consider: 0.01(2y+0.6)^2 - 0.04

I took out the common factor here as 0.01 hence

0.01 (2y+0.6) ^ 2 - 4

0.01 (2y+0.6)^2 -(2)^2

0.01 (2y + 0.6-2)(2y+0.6+2)

**0.01(2y-1.4)(2y+2.6)**

i checked the answer and it appeared as 0.04(y-0.7)(y+1.3)

I realised it could possibly due to the simplification of the two 2y's but on other problems when i removed 1 '2y' the other side got the 2 chopped off as well which leads me to another answer 0.02 (y-0.07)(y+1.3) could you please explain how it works? thanks.