miss sandy is fencing in her rectangular backyard, which 3x^2 is feet wide and 4xy +5x ^3y^2 feet long.
a.) find the perimeter of miss sandy's yard. show all work.
b.) how much fencing should miss sandy purchase? use mathematics to justify your answer.

hi, i am not sure about this one but i think its d,

hope this !

think the answer is 30 degrees. if not than it is 20 degrees. not 100% sure. let me know if it was right.

gill russ

x^2 + 81

we can factor this using difference of square binomials.

rewrite the equation:

x^2 - (-81)

factor:

(a^2 - b^2) = (√a^2 + √b^2)(√a^2 - √b^2)

(x^2 - (-81) = (x + √-81)(x - √-81)

we can remove the - from under the radical by multiplying it by i.

(x^2 - (-81) = (x + i√81)(x - i√81)

(x^2 - (-81) = (x + 9i)(x - 9i)

we can check our answer by using foil:

x^2 - 9ix + 9ix - 81i^2

x^2 - 81^2

i^2 = -1

x^2 + 81