Answer:
Step-by-step explanation:first you do -25 then go up by 40
X(x+8)=(x+4)(x+3)
x^2+8x=x^2+7x+12
x=12
original length = 20
original width = 12
next length = 15
next width = 16
Hey there!
Firstly, you need combine your like terms

stays the SAME 

- Combine the negative and the plus and make a negative symbol

Good luck on your assignment and enjoy your day!
~