## Algebra 1

16x$^{2}$ + 160x + 400
If each side is going to be four times as long as the original deck, then you must multiply the original length of (x + 5) by 4: 4(x + 5) = 4x + 20 Now, to find the area, multiply 4x +20 times itself: (4x + 20)(4x + 20) = 16x$^{2}$ + 80x + 80x + 400 = 16x$^{2}$ + 160x + 400