Solve for x in the equation x squared + 4 x minus 4 = 8.
x = –6 or x = 2
x = negative 2 plus-or-minus 2 startroot 2 endroot
x = –2 or x = 6
x = 2 plus-or-minus 2 startroot 2 endroot

- (2, -7)

- lines r and s and lines t and u must be parallel

180°

step-by-step explanation:

sum of equilateral triangle=180°

< n=60°

< m=120°°[angle supplementary of equilateral angle]

< m+< r+< x=360°(sum of exterior angle of triangle)

to find the perimeter, you add up all the lengths of the sides. in this case you would have to add up 18+22+40+80 which equals 160.