I need help fast please !!

Second -2(x + 6) / ((x - 4)(x + 4))

Step-by-step explanation:

x/(x² -16) - 3/(x-4)

x/(x+4)(x-4) - 3(x+4)/(x+4)(x-4)

(x - 3x - 12)/((x+4)(x-4))

-2x - 12 = -2(x + 6) / (x-4)(x+4)

828. all there is to it!

here, if you ever need with rounding (or other forms of arithmetic/math) again, use this:

thats the rounding one, but if you just click the top left, it shows you all the calculators you may need!

10 cm

step-by-step explanation:

if the polygon is a rectangle, then the perimeter is x+x+y+y. using the values that you gave, the perimeter is 3+3+2+2=10cm.