<h3><u>Part A</u></h3>
![\sf \rightarrow y^2 - 3y - 4y +12](https://tex.z-dn.net/?f=%5Csf%20%5Crightarrow%20%20y%5E2%20-%203y%20-%204y%20%2B12)
factor the common term 'y' and '-4'
![\sf \rightarrow y(y - 3) - 4(y - 3)](https://tex.z-dn.net/?f=%5Csf%20%5Crightarrow%20%20y%28y%20-%203%29%20-%204%28y%20-%203%29)
collect into groups
![\sf \rightarrow (y- 4)(y - 3)](https://tex.z-dn.net/?f=%5Csf%20%5Crightarrow%20%20%28y-%204%29%28y%20-%203%29)
<h3><u>Part B</u></h3>
![\sf \rightarrow 9x^2 - 12x + 4](https://tex.z-dn.net/?f=%5Csf%20%5Crightarrow%20%209x%5E2%20-%2012x%20%2B%204)
middle term split
![\sf \rightarrow 9x^2 - 6x - 6x+ 4](https://tex.z-dn.net/?f=%5Csf%20%5Crightarrow%20%209x%5E2%20-%206x%20-%206x%2B%204)
factor the common term '3x' and '-2'
![\sf \rightarrow 3x(3x - 2) -2( 3x-2)](https://tex.z-dn.net/?f=%5Csf%20%5Crightarrow%20%203x%283x%20-%202%29%20-2%28%203x-2%29)
collect into groups
![\sf \rightarrow (3x -2)( 3x-2)](https://tex.z-dn.net/?f=%5Csf%20%5Crightarrow%20%20%283x%20-2%29%28%203x-2%29)
simplify the following
![\sf \rightarrow (3x -2)^2](https://tex.z-dn.net/?f=%5Csf%20%5Crightarrow%20%20%283x%20-2%29%5E2)
Answer:
11.4
Step-by-step explanation:
57/5 as a mixed number is 11 2/5.
2/5 of a number is also known as 4/10 or 0.4, so add that to 11 to get 11.4.
Answer:
800 in scientific notation
8 * 10²