Can someone tell me if this is correct or not?
l-4b-8l + l-1-b^2l + 2b^3 ; b = -2
l-4(-2)-8l + l-1- -2^2l + 2(-2)^2
l8-8l + l4l + -4^3
l4l + -4^3
l4l - 64
l-60l
l60l

Question

Can someone tell me if this is correct or not?
l-4b-8l + l-1-b^2l + 2b^3   ; b = -2
l-4(-2)-8l + l-1- -2^2l + 2(-2)^2
l8-8l + l4l + -4^3
l4l + -4^3
l4l - 64
l-60l
l60l

anonymous · Answer

I feel like I did something wrong but I'm not sure where. My algebra 2 grade has dropped. Not much, but if I get this answer right it will bump my grade back up. I'm just confused and I need help. Thanks.

anonymous · Answer

the l4l should be l-5l, 
because l-1-(b^2)l
             l-1-(-2 *-2)l
             l-1-(4)l
             l-1-4l
             l-5l