PLEASE HELP
A hotel room has a volume of x3 – 5x2 – 24x – 20 ft3 and the height is (x + 2) ft. The floor is represented by what polynomial?

x2 – 7x – 10

x2 + x + 7

x2 + x – 7

x2 – 7x + 10

Question

PLEASE HELP
A hotel room has a volume of x3 – 5x2 – 24x – 20 ft3 and the height is (x + 2) ft. The floor is represented by what polynomial? 

 x2 – 7x – 10 

 x2 + x + 7 

 x2 + x – 7 

 x2 – 7x + 10

amistre64 · Answer

just multipiy the height back to the options to see what gets you back top volume if need be

amistre64 · Answer

2*7 is not 20; so thats out

amistre64 · Answer

and 2*n has to be -20, so +10 is out

anonymous · Answer

where di you come up with 2 * 7 ?

amistre64 · Answer

the last term of your volume poly is a -10

the last terms of your height and floor polys have to multiply to -10

2*7 is not 20 regardless of pos or neg

amistre64 · Answer

you do realize that they give you options for the floor poly right?

anonymous · Answer

ohh duh...

amistre64 · Answer

so, since 2*7 is not 20

and 2*10 is not -20

what does that leave us for a solution?

anonymous · Answer

hold on a sec figuring it out