Multiply each pair of conjugates

(2 sqrt6 +8) (2 sqrt6 -8)

-40

Step-by-step explanation:

(2 sqrt6 + 8) (2 sqrt6 - 8)

(2√6 + 8) (2√6 - 8)

2√6(2√6 - 8) + 8(2√6 - 8)

(2√6)^2 + (2√6 × -8) + (8 × 2√6) +(8 × -8)

(4 × 6) + (-16√6) + (16√6) + ( -64 )

24 - 16√6 + 16√6 - 64

24 - 64

-40

you can not drow on this

step-by-step explanation:

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer