Question 3 of 10 Which descriptions from the list below accurately describe the relationship between A ABC and A DEF? Check all that apply. 120B3 F 6 C 5 7 39 10 A 223 O A. Congruent B. Same shape C. Similar D. Same size SUBMIT

i got 10.28 but that rounds up to 10.3

just go here

its what i use

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