3. which integer represents the following phrase?
sorowe feet above sea level
a-50 b) -2 0-62 d 62
4. draw a point and correctly label these integers on the number line
-4,2-1,5

-5 4 3 2
1 2 3 4 5

the answer on e2020 is

10

4/5

3/5

4/3

step-by-step explanation:

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

a king of hearts and a 2 of spades