What is the area of rectangle WXYZ? A. 4 square units
B. 7.5 square units
C. 10 square units
D. 15 square units

the answer is 14 but i would choose the closest answer which is D. 15

Step-by-step explanation:

WZ = 5 units and if the left side of the bigger rectangle = 5 than you subtract 3 from it then you get to. Then you add 2 + 2 + 5 + 5

found it xd it ok yt

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