Multiply 2x(x2 + 5).
a) 2x3 + 10x2
b) 2x3 + 10x
c) 2x2 + 10x
d) 2x3 + 5x

The correct answer is B). 2x3 + 10x, this is because

2x(x2) gets you 2x3, because you just add an x instead of multiplying the x.

And 2x times 5 is 10x, because 2 x 5 is 10, and you just put the x on the ten to get 2x3 + 10x

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step-by-step explanation:

geometry: triangles

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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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