A rectangular solid is built by stacking 1x1x1 cubes on the figure shown. What is the total number of 1x1 squares that cover six faces(surfaces) of the rectangular solid? A.) 120
B.)112
C.)196
D.)144

17.08

correct me if i am wrong.

hello from mrbilldoesmath!

answer:

(7 x + 6 y) (49 x^2 - 42 x y + 36 y^2)

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

a^3 + b^3 =   (a + b) (a^2 - a b + b^2).

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb

step-by-step explanation:

there's the chart

really your just stupid if you don't know this

step-by-step explanation: