What are the solutions of the equation (x + 2)2 + 12(x + 2) – 14 = 0? Use u substitution and the quadratic formula to solve. x = negative 8 plus-or-minus 5 StartRoot 2 EndRoot x = negative 6 plus-or-minus 5 StartRoot 2 EndRoot x = negative 4 plus-or-minus 5 StartRoot 2 EndRoot x = negative 2 plus-or-minus 5 StartRoot 2 EndRoot

B.

Step-by-step explanation:

substitute u for (x+2)

use the quadratic formula

Then set everything equal to u: (x+2)

u-2= -12 plus-or-minus 10 sqrt{2}/2

18

step-by-step explanation:

draw the shape and you will see that f and k are actually at adjacent vertices (points of the hexagon that are neighboring).   so find the distance between (1,2) and (4,2).   that is easy since (1,2) and (4,2) is just a vertical distance to count, which is 3.   it is a regular polygon which means all sides are congruent.   you have 6 sides (hexa) so multiply 6 by 3 to receive 18.

1^3 + 2^3 + 3^3 +4^3 = (1+2+3+4)^2

step-by-step explanation:

i am only able to answer the first part. i am not sure about the second part. sorry