Factor by grouping: x^3+2x^2−4x−8. Which of the following is one of the factors? A. (x2−4x)
B. (x−2)
C. (x2−2)
D. (x2−4)

B. (x−2)

Step-by-step explanation:

Factor out x^2

x^2(x+2)-4x-8

Factor out 4

x^2(x+2)-4(x+2)

Now combine

(x^2-4)(x+2)

Factor x^2-4 (notice that it is a difference of squares)

(x+2)(x-2)(x+2)  -x+2 is twice so we can square it

(x+2)^2(x-2)

i need more info. are you looked to see there mph? how much they deliver? how far they go?

step-by-step explanation:

geometry: triangles

solvers

lessons

answers archive

call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

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