WILL GIVE MEDAL AND FAN!!!!!!!

A rectangular fountain has an area of (16x^2+8x+1)ft squared. The dimensions of the rectangle have the form ax+b, where a and b are whole numbers. Write an expression for the perimeter of the fountain. Then find the perimeter when x=2 feet.

Question

WILL GIVE MEDAL AND FAN!!!!!!!

A rectangular fountain has an area of (16x^2+8x+1)ft squared. The dimensions of the rectangle have the form ax+b, where a and b are whole numbers. Write an expression for the perimeter of the fountain. Then find the perimeter when x=2 feet.

anonymous · Answer

I KNOW YOU ARE SUPPOSED TO FACTOR BUT DON'T KNOW HOW???

anonymous · Answer

P=4(4x+1)
i think

so then 36

anonymous · Answer

could you please show steps

anonymous · Answer

16x^2 + 4x +4x +1
4x(4x +1)+1(4x+1)
(4x +1)^2 = area

4(4x=1) =P

anonymous · Answer

thanks could you help with more?

anonymous · Answer

sure

anonymous · Answer

1 min please

anonymous · Answer

A square tabletop has an area of (9x^2-90x+225) cm^2. The dimensions of the tabletop have the form cx-d, where c and d are whole numbers. Write an expression for the perimeter when x=25 cm.

anonymous · Answer

one sec, i'm working it out

anonymous · Answer

ok

anonymous · Answer

do u get how to factor it?
by browser keeps stopping so i keep losing it

anonymous · Answer

kind of.....

anonymous · Answer

P = 4(9x - 45)
36x -180
36(25)-180
720 cm

anonymous · Answer

how did you get 4(9x-45) please show steps

anonymous · Answer

9x^2 -45x -45x + 225
9x(x-5)-45(x-5)
(9x-45)(x-5)
9(x-5)(x-5)
9(x-5)^2 = area, so one side=9(x-5)