Which expression is a sum of cubes? a. -27a^3b^6+8a^9b^12 b. -9a^3b^6+a^9b^10 c. 9a^3b^6+8a^9b^12 d. 27a^3b^6+8a^9b^12

A.

D.

Step-by-step explanation:

A.

which is equivalent to

This expression is a sum of cubes.

B.

Here 9 is not a perfect cube and power of b in second term is 10 which is not a multiple of 3 , thus this cannot be written as sum of cubes.

C.

Here 9 is not a perfect cube. Thus this cannot be written as sum of cubes.

D.

This expression is a sum of cubes.

start with a line segment pq that we will copy. mark a point r that will be one endpoint of the new line segment. set the compasses' point on the point p of the line segment to be copied. adjust the compasses' width to the point q. the compasses' width is now equal to the length of the line segment pq.

step-by-step explanation:

351°f

step-by-step explanation: