Complete the square for the expression x^2+8x. Then factor the trinomial.
x^2 + 8x + _ = _

see below

Step-by-step explanation:

x^2 + 8x + _ = _

To complete the square, take the coefficient of the x term

8

Divide by 2

8/2 =4

Square it

4^2 =16

Add this to both sides

x^2 + 8x + 16_ = 16_

Now the left side factors into  (x+ 8/2)^2

(x+4)^2 = 16

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2

the correct answer is d

hope this